Merge remote-tracking branch 'github/pr/13'

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index d839df80b370f8bc7e003376f0efd11ec14a3da7..3542557c4b7776092b7f5f147508fdfc732ac12b 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -52,7 +52,7 @@
 .set I   "    "
 
 .macro copyyear
 .set I   "    "
 
 .macro copyyear

-2013
+2014

 .endmacro
 
 . /////////////////////////////////////////////////////////////////////////////
 .endmacro
 
 . /////////////////////////////////////////////////////////////////////////////


@@ -553,11 +553,9 @@ key &'0x403043153903637F'&, although that key is expected to be replaced in 2013
 A trust path from Nigel's key to Phil's can be observed at
 &url(https://www.security.spodhuis.org/exim-trustpath).
 
 A trust path from Nigel's key to Phil's can be observed at
 &url(https://www.security.spodhuis.org/exim-trustpath).
 

-.new

 Releases have also been authorized to be performed by Todd Lyons who signs with
 key &'0xC4F4F94804D29EBA'&. A direct trust path exists between previous RE Phil
 Pennock and Todd Lyons through a common associate.
 Releases have also been authorized to be performed by Todd Lyons who signs with
 key &'0xC4F4F94804D29EBA'&. A direct trust path exists between previous RE Phil
 Pennock and Todd Lyons through a common associate.

-.wen

 
 The signatures for the tar bundles are in:
 .display
 
 The signatures for the tar bundles are in:
 .display


@@ -871,14 +869,12 @@ SOFTWARE.
 .endblockquote
 
 .next
 .endblockquote
 
 .next

-.new

 .cindex "opendmarc" "acknowledgment"
 The DMARC implementation uses the OpenDMARC library which is Copyrighted by
 The Trusted Domain Project. Portions of Exim source which use OpenDMARC
 derived code are indicated in the respective source files. The full OpenDMARC
 license is provided in the LICENSE.opendmarc file contained in the distributed
 source code.
 .cindex "opendmarc" "acknowledgment"
 The DMARC implementation uses the OpenDMARC library which is Copyrighted by
 The Trusted Domain Project. Portions of Exim source which use OpenDMARC
 derived code are indicated in the respective source files. The full OpenDMARC
 license is provided in the LICENSE.opendmarc file contained in the distributed
 source code.

-.wen

 
 .next
 Many people have contributed code fragments, some large, some small, that were
 
 .next
 Many people have contributed code fragments, some large, some small, that were


@@ -1382,7 +1378,7 @@ Setting the &%verify%& option actually sets two options, &%verify_sender%& and
 &%verify_recipient%&, which independently control the use of the router for
 sender and recipient verification. You can set these options directly if
 you want a router to be used for only one type of verification.
 &%verify_recipient%&, which independently control the use of the router for
 sender and recipient verification. You can set these options directly if
 you want a router to be used for only one type of verification.

-.new "Note that cutthrough delivery is classed as a recipient verification for this purpose."
+Note that cutthrough delivery is classed as a recipient verification for this purpose.

 .next
 If the &%address_test%& option is set false, the router is skipped when Exim is
 run with the &%-bt%& option to test an address routing. This can be helpful
 .next
 If the &%address_test%& option is set false, the router is skipped when Exim is
 run with the &%-bt%& option to test an address routing. This can be helpful


@@ -1392,7 +1388,7 @@ having to simulate the effect of the scanner.
 .next
 Routers can be designated for use only when verifying an address, as
 opposed to routing it for delivery. The &%verify_only%& option controls this.
 .next
 Routers can be designated for use only when verifying an address, as
 opposed to routing it for delivery. The &%verify_only%& option controls this.

-.new "Again, cutthrough delivery counts as a verification."
+Again, cutthrough delivery counts as a verification.

 .next
 Individual routers can be explicitly skipped when running the routers to
 check an address given in the SMTP EXPN command (see the &%expn%& option).
 .next
 Individual routers can be explicitly skipped when running the routers to
 check an address given in the SMTP EXPN command (see the &%expn%& option).


@@ -2714,14 +2710,12 @@ no arguments.
 This option is an alias for &%-bV%& and causes version information to be
 displayed.
 
 This option is an alias for &%-bV%& and causes version information to be
 displayed.
 

-.new

 .vitem &%-Ac%& &&&
        &%-Am%&
 .oindex "&%-Ac%&"
 .oindex "&%-Am%&"
 These options are used by Sendmail for selecting configuration files and are
 ignored by Exim.
 .vitem &%-Ac%& &&&
        &%-Am%&
 .oindex "&%-Ac%&"
 .oindex "&%-Am%&"
 These options are used by Sendmail for selecting configuration files and are
 ignored by Exim.

-.wen

 
 .vitem &%-B%&<&'type'&>
 .oindex "&%-B%&"
 
 .vitem &%-B%&<&'type'&>
 .oindex "&%-B%&"


@@ -2982,7 +2976,6 @@ use the &'exim_dbmbuild'& utility, or some other means, to rebuild alias files
 if this is required. If the &%bi_command%& option is not set, calling Exim with
 &%-bi%& is a no-op.
 
 if this is required. If the &%bi_command%& option is not set, calling Exim with
 &%-bi%& is a no-op.
 

-.new

 . // Keep :help first, then the rest in alphabetical order
 .vitem &%-bI:help%&
 .oindex "&%-bI:help%&"
 . // Keep :help first, then the rest in alphabetical order
 .vitem &%-bI:help%&
 .oindex "&%-bI:help%&"


@@ -3008,7 +3001,6 @@ useful for ManageSieve (RFC 5804) implementations, in providing that protocol's
 &`SIEVE`& capability response line.  As the precise list may depend upon
 compile-time build options, which this option will adapt to, this is the only
 way to guarantee a correct response.
 &`SIEVE`& capability response line.  As the precise list may depend upon
 compile-time build options, which this option will adapt to, this is the only
 way to guarantee a correct response.

-.wen

 
 .vitem &%-bm%&
 .oindex "&%-bm%&"
 
 .vitem &%-bm%&
 .oindex "&%-bm%&"


@@ -3123,11 +3115,9 @@ configuration file is output.
 If a list of configuration files was supplied, the value that is output here
 is the name of the file that was actually used.
 
 If a list of configuration files was supplied, the value that is output here
 is the name of the file that was actually used.
 

-.new

 .cindex "options" "hiding name of"
 If the &%-n%& flag is given, then for most modes of &%-bP%& operation the
 name will not be output.
 .cindex "options" "hiding name of"
 If the &%-n%& flag is given, then for most modes of &%-bP%& operation the
 name will not be output.

-.wen

 
 .cindex "daemon" "process id (pid)"
 .cindex "pid (process id)" "of daemon"
 
 .cindex "daemon" "process id (pid)"
 .cindex "pid (process id)" "of daemon"


@@ -3732,7 +3722,6 @@ if &%-f%& is also present, it overrides &"From&~"&.
 .vitem &%-G%&
 .oindex "&%-G%&"
 .cindex "submission fixups, suppressing (command-line)"
 .vitem &%-G%&
 .oindex "&%-G%&"
 .cindex "submission fixups, suppressing (command-line)"

-.new

 This option is equivalent to an ACL applying:
 .code
 control = suppress_local_fixups
 This option is equivalent to an ACL applying:
 .code
 control = suppress_local_fixups


@@ -3743,7 +3732,6 @@ in future.
 
 As this affects audit information, the caller must be a trusted user to use
 this option.
 
 As this affects audit information, the caller must be a trusted user to use
 this option.

-.wen

 
 .vitem &%-h%&&~<&'number'&>
 .oindex "&%-h%&"
 
 .vitem &%-h%&&~<&'number'&>
 .oindex "&%-h%&"


@@ -3761,7 +3749,6 @@ line by itself should not terminate an incoming, non-SMTP message. I can find
 no documentation for this option in Solaris 2.4 Sendmail, but the &'mailx'&
 command in Solaris 2.4 uses it. See also &%-ti%&.
 
 no documentation for this option in Solaris 2.4 Sendmail, but the &'mailx'&
 command in Solaris 2.4 uses it. See also &%-ti%&.
 

-.new

 .vitem &%-L%&&~<&'tag'&>
 .oindex "&%-L%&"
 .cindex "syslog" "process name; set with flag"
 .vitem &%-L%&&~<&'tag'&>
 .oindex "&%-L%&"
 .cindex "syslog" "process name; set with flag"


@@ -3772,7 +3759,6 @@ read and parsed, to determine access rights, before this is set and takes
 effect, so early configuration file errors will not honour this flag.
 
 The tag should not be longer than 32 characters.
 effect, so early configuration file errors will not honour this flag.
 
 The tag should not be longer than 32 characters.

-.wen

 
 .vitem &%-M%&&~<&'message&~id'&>&~<&'message&~id'&>&~...
 .oindex "&%-M%&"
 
 .vitem &%-M%&&~<&'message&~id'&>&~<&'message&~id'&>&~...
 .oindex "&%-M%&"


@@ -4012,13 +3998,11 @@ routing problem. Once &%-N%& has been used for a delivery attempt, it sticks to
 the message, and applies to any subsequent delivery attempts that may happen
 for that message.
 
 the message, and applies to any subsequent delivery attempts that may happen
 for that message.
 

-.new

 .vitem &%-n%&
 .oindex "&%-n%&"
 This option is interpreted by Sendmail to mean &"no aliasing"&.
 For normal modes of operation, it is ignored by Exim.
 When combined with &%-bP%& it suppresses the name of an option from being output.
 .vitem &%-n%&
 .oindex "&%-n%&"
 This option is interpreted by Sendmail to mean &"no aliasing"&.
 For normal modes of operation, it is ignored by Exim.
 When combined with &%-bP%& it suppresses the name of an option from being output.

-.wen

 
 .vitem &%-O%&&~<&'data'&>
 .oindex "&%-O%&"
 
 .vitem &%-O%&&~<&'data'&>
 .oindex "&%-O%&"


@@ -4638,12 +4622,10 @@ National Language Support extended characters in the body of the mail item"&).
 It sets &%-x%& when calling the MTA from its &%mail%& command. Exim ignores
 this option.
 
 It sets &%-x%& when calling the MTA from its &%mail%& command. Exim ignores
 this option.
 

-.new

 .vitem &%-X%&&~<&'logfile'&>
 .oindex "&%-X%&"
 This option is interpreted by Sendmail to cause debug information to be sent
 to the named file.  It is ignored by Exim.
 .vitem &%-X%&&~<&'logfile'&>
 .oindex "&%-X%&"
 This option is interpreted by Sendmail to cause debug information to be sent
 to the named file.  It is ignored by Exim.

-.wen

 .endlist
 
 .ecindex IIDclo1
 .endlist
 
 .ecindex IIDclo1


@@ -6858,7 +6840,7 @@ is used on its own as the result. If the lookup does not succeed, the
 &`fail`& keyword causes a &'forced expansion failure'& &-- see section
 &<<SECTforexpfai>>& for an explanation of what this means.
 
 &`fail`& keyword causes a &'forced expansion failure'& &-- see section
 &<<SECTforexpfai>>& for an explanation of what this means.
 

-The supported DNS record types are A, CNAME, MX, NS, PTR, SPF, SRV, and TXT,
+The supported DNS record types are A, CNAME, MX, NS, PTR, SPF, SRV, TLSA and TXT,

 and, when Exim is compiled with IPv6 support, AAAA (and A6 if that is also
 configured). If no type is given, TXT is assumed. When the type is PTR,
 the data can be an IP address, written as normal; inversion and the addition of
 and, when Exim is compiled with IPv6 support, AAAA (and A6 if that is also
 configured). If no type is given, TXT is assumed. When the type is PTR,
 the data can be an IP address, written as normal; inversion and the addition of


@@ -6949,7 +6931,6 @@ has two space-separated fields: an authorization code and a target host name.
 The authorization code can be &"Y"& for yes, &"N"& for no, &"X"& for explicit
 authorization required but absent, or &"?"& for unknown.
 
 The authorization code can be &"Y"& for yes, &"N"& for no, &"X"& for explicit
 authorization required but absent, or &"?"& for unknown.
 

-.new

 .cindex "A+" "in &(dnsdb)& lookup"
 The pseudo-type A+ performs an A6 lookup (if configured) followed by an AAAA
 and then an A lookup.  All results are returned; defer processing
 .cindex "A+" "in &(dnsdb)& lookup"
 The pseudo-type A+ performs an A6 lookup (if configured) followed by an AAAA
 and then an A lookup.  All results are returned; defer processing


@@ -6957,7 +6938,6 @@ and then an A lookup.  All results are returned; defer processing
 .code
 ${lookup dnsdb {>; a+=$sender_helo_name}}
 .endd
 .code
 ${lookup dnsdb {>; a+=$sender_helo_name}}
 .endd

-.wen

 
 
 .section "Multiple dnsdb lookups" "SECID67"
 
 
 .section "Multiple dnsdb lookups" "SECID67"


@@ -7060,6 +7040,18 @@ With sufficiently modern LDAP libraries, Exim supports forcing TLS over regular
 LDAP connections, rather than the SSL-on-connect &`ldaps`&.
 See the &%ldap_start_tls%& option.
 
 LDAP connections, rather than the SSL-on-connect &`ldaps`&.
 See the &%ldap_start_tls%& option.
 

+.new
+Starting with Exim 4.83, the initialization of LDAP with TLS is more tightly
+controlled. Every part of the TLS configuration can be configured by settings in
+&_exim.conf_&. Depending on the version of the client libraries installed on
+your system, some of the initialization may have required setting options in
+&_/etc/ldap.conf_& or &_~/.ldaprc_& to get TLS working with self-signed
+certificates. This revealed a nuance where the current UID that exim was
+running as could affect which config files it read. With Exim 4.83, these
+methods become optional, only taking effect if not specifically set in
+&_exim.conf_&.
+.wen
+

 
 .section "LDAP quoting" "SECID68"
 .cindex "LDAP" "quoting"
 
 .section "LDAP quoting" "SECID68"
 .cindex "LDAP" "quoting"


@@ -8307,7 +8299,13 @@ list. The effect of each one lasts until the next, or until the end of the
 list.
 
 .new
 list.
 
 .new

-To explain the host/ip processing logic a different way for the same ACL:
+.section "Mixing wildcarded host names and addresses in host lists" &&&
+         "SECTmixwilhos"
+.cindex "host list" "mixing names and addresses in"
+
+This section explains the host/ip processing logic with the same concepts
+as the previous section, but specifically addresses what happens when a
+wildcarded hostname is one of the items in the hostlist.

 
 .ilist
 If you have name lookups or wildcarded host names and
 
 .ilist
 If you have name lookups or wildcarded host names and


@@ -8339,7 +8337,6 @@ this section.
 .wen
 
 
 .wen
 
 

-

 .section "Temporary DNS errors when looking up host information" &&&
          "SECTtemdnserr"
 .cindex "host" "lookup failures, temporary"
 .section "Temporary DNS errors when looking up host information" &&&
          "SECTtemdnserr"
 .cindex "host" "lookup failures, temporary"


@@ -8409,33 +8406,6 @@ See section &<<SECThoslispatsikey>>&.)
 
 
 
 
 
 

-.section "Mixing wildcarded host names and addresses in host lists" &&&
-         "SECTmixwilhos"
-.cindex "host list" "mixing names and addresses in"
-If you have name lookups or wildcarded host names and IP addresses in the same
-host list, you should normally put the IP addresses first. For example, in an
-ACL you could have:
-.code
-accept hosts = 10.9.8.7 : *.friend.example
-.endd
-The reason for this lies in the left-to-right way that Exim processes lists.
-It can test IP addresses without doing any DNS lookups, but when it reaches an
-item that requires a host name, it fails if it cannot find a host name to
-compare with the pattern. If the above list is given in the opposite order, the
-&%accept%& statement fails for a host whose name cannot be found, even if its
-IP address is 10.9.8.7.
-
-If you really do want to do the name check first, and still recognize the IP
-address, you can rewrite the ACL like this:
-.code
-accept hosts = *.friend.example
-accept hosts = 10.9.8.7
-.endd
-If the first &%accept%& fails, Exim goes on to try the second one. See chapter
-&<<CHAPACL>>& for details of ACLs.
-
-
-

 
 
 .section "Address lists" "SECTaddresslist"
 
 
 .section "Address lists" "SECTaddresslist"


@@ -8843,7 +8813,6 @@ This item inserts &"basic"& header lines. It is described with the &%header%&
 expansion item below.
 
 
 expansion item below.
 
 

-.new

 .vitem "&*${acl{*&<&'name'&>&*}{*&<&'arg'&>&*}...}*&"
 .cindex "expansion" "calling an acl"
 .cindex "&%acl%&" "call from expansion"
 .vitem "&*${acl{*&<&'name'&>&*}{*&<&'arg'&>&*}...}*&"
 .cindex "expansion" "calling an acl"
 .cindex "&%acl%&" "call from expansion"


@@ -8858,7 +8827,6 @@ the result of the expansion.
 If no message is set and the ACL returns accept or deny
 the expansion result is an empty string.
 If the ACL returns defer the result is a forced-fail.  Otherwise the expansion fails.
 If no message is set and the ACL returns accept or deny
 the expansion result is an empty string.
 If the ACL returns defer the result is a forced-fail.  Otherwise the expansion fails.

-.wen

 
 
 .vitem "&*${dlfunc{*&<&'file'&>&*}{*&<&'function'&>&*}{*&<&'arg'&>&*}&&&
 
 
 .vitem "&*${dlfunc{*&<&'file'&>&*}{*&<&'function'&>&*}{*&<&'arg'&>&*}&&&


@@ -9193,6 +9161,44 @@ of <&'string2'&>, whichever is the shorter. Do not confuse &%length%& with
 &%strlen%&, which gives the length of a string.
 
 
 &%strlen%&, which gives the length of a string.
 
 

+.vitem "&*${listextract{*&<&'number'&>&*}&&&
+        {*&<&'string1'&>&*}{*&<&'string2'&>&*}{*&<&'string3'&>&*}}*&"
+.cindex "expansion" "extracting list elements by number"
+.cindex "&%listextract%&" "extract list elements by number"
+.cindex "list" "extracting elements by number"
+The <&'number'&> argument must consist entirely of decimal digits,
+apart from an optional leading minus,
+and leading and trailing white space (which is ignored).
+
+After expansion, <&'string1'&> is interpreted as a list, colon-separated by
+default, but the separator can be changed in the usual way.
+
+The first field of the list is numbered one.
+If the number is negative, the fields are
+counted from the end of the list, with the rightmost one numbered -1.
+The numbered element of the list is extracted and placed in &$value$&,
+then <&'string2'&> is expanded as the result.
+
+If the modulus of the
+number is zero or greater than the number of fields in the string,
+the result is the expansion of <&'string3'&>.
+
+For example:
+.code
+${listextract{2}{x:42:99}}
+.endd
+yields &"42"&, and
+.code
+${listextract{-3}{<, x,42,99,& Mailer,,/bin/bash}{result: $value}}
+.endd
+yields &"result: 99"&.
+
+If {<&'string3'&>} is omitted, an empty string is used for string3.
+If {<&'string2'&>} is also omitted, the value that was
+extracted is used.
+You can use &`fail`& instead of {<&'string3'&>} as in a string extract.
+
+

 .vitem "&*${lookup{*&<&'key'&>&*}&~*&<&'search&~type'&>&*&~&&&
         {*&<&'file'&>&*}&~{*&<&'string1'&>&*}&~{*&<&'string2'&>&*}}*&"
 This is the first of one of two different types of lookup item, which are both
 .vitem "&*${lookup{*&<&'key'&>&*}&~*&<&'search&~type'&>&*&~&&&
         {*&<&'file'&>&*}&~{*&<&'string1'&>&*}&~{*&<&'string2'&>&*}}*&"
 This is the first of one of two different types of lookup item, which are both


@@ -9491,7 +9497,6 @@ can be the word &"fail"& (not in braces) to force expansion failure if the
 command does not succeed. If both strings are omitted, the result is contents
 of the standard output/error on success, and nothing on failure.
 
 command does not succeed. If both strings are omitted, the result is contents
 of the standard output/error on success, and nothing on failure.
 

-.new

 .vindex "&$run_in_acl$&"
 The standard output/error of the command is put in the variable &$value$&.
 In this ACL example, the output of a command is logged for the admin to
 .vindex "&$run_in_acl$&"
 The standard output/error of the command is put in the variable &$value$&.
 In this ACL example, the output of a command is logged for the admin to


@@ -9505,7 +9510,6 @@ shell must be invoked directly, such as with:
 .code
 ${run{/bin/bash -c "/usr/bin/id >/tmp/id"}{yes}{yes}}
 .endd
 .code
 ${run{/bin/bash -c "/usr/bin/id >/tmp/id"}{yes}{yes}}
 .endd

-.wen

 
 .vindex "&$runrc$&"
 The return code from the command is put in the variable &$runrc$&, and this
 
 .vindex "&$runrc$&"
 The return code from the command is put in the variable &$runrc$&, and this


@@ -9667,7 +9671,6 @@ expansion item, which extracts the working address from a single RFC2822
 address. See the &*filter*&, &*map*&, and &*reduce*& items for ways of
 processing lists.
 
 address. See the &*filter*&, &*map*&, and &*reduce*& items for ways of
 processing lists.
 

-.new

 To clarify "list of addresses in RFC 2822 format" mentioned above, Exim follows
 a strict interpretation of header line formatting.  Exim parses the bare,
 unquoted portion of an email address and if it finds a comma, treats it as an
 To clarify "list of addresses in RFC 2822 format" mentioned above, Exim follows
 a strict interpretation of header line formatting.  Exim parses the bare,
 unquoted portion of an email address and if it finds a comma, treats it as an


@@ -9691,7 +9694,6 @@ Last:user@example.com
 # exim -be '${addresses:From: "Last, First" <user@example.com>}'
 user@example.com
 .endd
 # exim -be '${addresses:From: "Last, First" <user@example.com>}'
 user@example.com
 .endd

-.wen

 
 .vitem &*${base62:*&<&'digits'&>&*}*&
 .cindex "&%base62%& expansion item"
 
 .vitem &*${base62:*&<&'digits'&>&*}*&
 .cindex "&%base62%& expansion item"


@@ -9847,7 +9849,6 @@ be useful for processing the output of the MD5 and SHA-1 hashing functions.
 
 
 
 
 
 

-.new

 .vitem &*${hexquote:*&<&'string'&>&*}*&
 .cindex "quoting" "hex-encoded unprintable characters"
 .cindex "&%hexquote%& expansion item"
 .vitem &*${hexquote:*&<&'string'&>&*}*&
 .cindex "quoting" "hex-encoded unprintable characters"
 .cindex "&%hexquote%& expansion item"


@@ -9855,7 +9856,6 @@ This operator converts non-printable characters in a string into a hex
 escape form. Byte values between 33 (!) and 126 (~) inclusive are left
 as is, and other byte values are converted to &`\xNN`&, for example a
 byte value 127 is converted to &`\x7f`&.
 escape form. Byte values between 33 (!) and 126 (~) inclusive are left
 as is, and other byte values are converted to &`\xNN`&, for example a
 byte value 127 is converted to &`\x7f`&.

-.wen

 
 
 .vitem &*${lc:*&<&'string'&>&*}*&
 
 
 .vitem &*${lc:*&<&'string'&>&*}*&


@@ -9883,7 +9883,6 @@ See the description of the general &%length%& item above for details. Note that
 when &%length%& is used as an operator.
 
 
 when &%length%& is used as an operator.
 
 

-.new

 .vitem &*${listcount:*&<&'string'&>&*}*&
 .cindex "expansion" "list item count"
 .cindex "list" "item count"
 .vitem &*${listcount:*&<&'string'&>&*}*&
 .cindex "expansion" "list item count"
 .cindex "list" "item count"


@@ -9901,7 +9900,6 @@ If the optional type is given it must be one of "a", "d", "h" or "l"
 and selects address-, domain-, host- or localpart- lists to search among respectively.
 Otherwise all types are searched in an undefined order and the first
 matching list is returned.
 and selects address-, domain-, host- or localpart- lists to search among respectively.
 Otherwise all types are searched in an undefined order and the first
 matching list is returned.

-.wen

 
 
 .vitem &*${local_part:*&<&'string'&>&*}*&
 
 
 .vitem &*${local_part:*&<&'string'&>&*}*&


@@ -10153,6 +10151,14 @@ number of larger units and output in Exim's normal time format, for example,
 .cindex "expansion" "case forcing"
 .cindex "&%uc%& expansion item"
 This forces the letters in the string into upper-case.
 .cindex "expansion" "case forcing"
 .cindex "&%uc%& expansion item"
 This forces the letters in the string into upper-case.

+
+.vitem &*${utf8clean:*&<&'string'&>&*}*&
+.cindex "correction of invalid utf-8 sequences in strings"
+.cindex "utf-8" "utf-8 sequences"
+.cindex "incorrect utf-8"
+.cindex "expansion" "utf-8 forcing"
+.cindex "&%utf8clean%& expansion item"
+This replaces any invalid utf-8 sequence in the string by the character &`?`&.

 .endlist
 
 
 .endlist
 
 


@@ -10201,7 +10207,6 @@ In all cases, a relative comparator OP is testing if <&'string1'&> OP
 10M, not if 10M is larger than &$message_size$&.
 
 
 10M, not if 10M is larger than &$message_size$&.
 
 

-.new

 .vitem &*acl&~{{*&<&'name'&>&*}{*&<&'arg1'&>&*}&&&
        {*&<&'arg2'&>&*}...}*&
 .cindex "expansion" "calling an acl"
 .vitem &*acl&~{{*&<&'name'&>&*}{*&<&'arg1'&>&*}&&&
        {*&<&'arg2'&>&*}...}*&
 .cindex "expansion" "calling an acl"


@@ -10216,14 +10221,13 @@ a value using a "message =" modifier the variable $value becomes
 the result of the expansion, otherwise it is empty.
 If the ACL returns accept the condition is true; if deny, false.
 If the ACL returns defer the result is a forced-fail.
 the result of the expansion, otherwise it is empty.
 If the ACL returns accept the condition is true; if deny, false.
 If the ACL returns defer the result is a forced-fail.

-.wen

 
 .vitem &*bool&~{*&<&'string'&>&*}*&
 .cindex "expansion" "boolean parsing"
 .cindex "&%bool%& expansion condition"
 This condition turns a string holding a true or false representation into
 a boolean state.  It parses &"true"&, &"false"&, &"yes"& and &"no"&
 
 .vitem &*bool&~{*&<&'string'&>&*}*&
 .cindex "expansion" "boolean parsing"
 .cindex "&%bool%& expansion condition"
 This condition turns a string holding a true or false representation into
 a boolean state.  It parses &"true"&, &"false"&, &"yes"& and &"no"&

-(case-insensitively); also positive integer numbers map to true if non-zero,
+(case-insensitively); also integer numbers map to true if non-zero,

 false if zero.
 An empty string is treated as false.
 Leading and trailing whitespace is ignored;
 false if zero.
 An empty string is treated as false.
 Leading and trailing whitespace is ignored;


@@ -10412,7 +10416,7 @@ ${if forany{<, $recipients}{match{$item}{^user3@}}{yes}{no}}
 The value of &$item$& is saved and restored while &*forany*& or &*forall*& is
 being processed, to enable these expansion items to be nested.
 
 The value of &$item$& is saved and restored while &*forany*& or &*forall*& is
 being processed, to enable these expansion items to be nested.
 

-.new "To scan a named list, expand it with the &*listnamed*& operator."
+To scan a named list, expand it with the &*listnamed*& operator.

 
 
 .vitem &*ge&~{*&<&'string1'&>&*}{*&<&'string2'&>&*}*& &&&
 
 
 .vitem &*ge&~{*&<&'string1'&>&*}{*&<&'string2'&>&*}*& &&&


@@ -10957,7 +10961,6 @@ the value of &$authenticated_id$& is normally the login name of the calling
 process. However, a trusted user can override this by means of the &%-oMai%&
 command line option.
 
 process. However, a trusted user can override this by means of the &%-oMai%&
 command line option.
 

-.new

 .vitem &$authenticated_fail_id$&
 .cindex "authentication" "fail" "id"
 .vindex "&$authenticated_fail_id$&"
 .vitem &$authenticated_fail_id$&
 .cindex "authentication" "fail" "id"
 .vindex "&$authenticated_fail_id$&"


@@ -10968,7 +10971,6 @@ available for processing in the ACL's, generally the quit or notquit ACL.
 A message to a local recipient could still be accepted without requiring
 authentication, which means this variable could also be visible in all of
 the ACL's as well.
 A message to a local recipient could still be accepted without requiring
 authentication, which means this variable could also be visible in all of
 the ACL's as well.

-.wen

 
 
 .vitem &$authenticated_sender$&
 
 
 .vitem &$authenticated_sender$&


@@ -11181,13 +11183,11 @@ inserting the message header line with the given name. Note that the name must
 be terminated by colon or white space, because it may contain a wide variety of
 characters. Note also that braces must &'not'& be used.
 
 be terminated by colon or white space, because it may contain a wide variety of
 characters. Note also that braces must &'not'& be used.
 

-.new

 .vitem &$headers_added$&
 .vindex "&$headers_added$&"
 Within an ACL this variable contains the headers added so far by
 the ACL modifier add_header (section &<<SECTaddheadacl>>&).
 The headers are a newline-separated list.
 .vitem &$headers_added$&
 .vindex "&$headers_added$&"
 Within an ACL this variable contains the headers added so far by
 the ACL modifier add_header (section &<<SECTaddheadacl>>&).
 The headers are a newline-separated list.

-.wen

 
 .vitem &$home$&
 .vindex "&$home$&"
 
 .vitem &$home$&
 .vindex "&$home$&"


@@ -11859,13 +11859,11 @@ envelope sender.
 .vindex "&$return_size_limit$&"
 This is an obsolete name for &$bounce_return_size_limit$&.
 
 .vindex "&$return_size_limit$&"
 This is an obsolete name for &$bounce_return_size_limit$&.
 

-.new

 .vitem &$router_name$&
 .cindex "router" "name"
 .cindex "name" "of router"
 .vindex "&$router_name$&"
 During the running of a router this variable contains its name.
 .vitem &$router_name$&
 .cindex "router" "name"
 .cindex "name" "of router"
 .vindex "&$router_name$&"
 During the running of a router this variable contains its name.

-.wen

 
 .vitem &$runrc$&
 .cindex "return code" "from &%run%& expansion"
 
 .vitem &$runrc$&
 .cindex "return code" "from &%run%& expansion"


@@ -11958,7 +11956,6 @@ driver that successfully authenticated the client from which the message was
 received. It is empty if there was no successful authentication. See also
 &$authenticated_id$&.
 
 received. It is empty if there was no successful authentication. See also
 &$authenticated_id$&.
 

-.new

 .vitem &$sender_host_dnssec$&
 .vindex "&$sender_host_dnssec$&"
 If &$sender_host_name$& has been populated (by reference, &%hosts_lookup%& or
 .vitem &$sender_host_dnssec$&
 .vindex "&$sender_host_dnssec$&"
 If &$sender_host_name$& has been populated (by reference, &%hosts_lookup%& or


@@ -11969,7 +11966,7 @@ other times, this variable is false.
 It is likely that you will need to coerce DNSSEC support on in the resolver
 library, by setting:
 .code
 It is likely that you will need to coerce DNSSEC support on in the resolver
 library, by setting:
 .code

-dns_use_dnssec = 1
+dns_dnssec_ok = 1

 .endd
 
 Exim does not perform DNSSEC validation itself, instead leaving that to a
 .endd
 
 Exim does not perform DNSSEC validation itself, instead leaving that to a


@@ -11980,7 +11977,6 @@ with DNSSEC, only the reverse DNS.
 
 If you have changed &%host_lookup_order%& so that &`bydns`& is not the first
 mechanism in the list, then this variable will be false.
 
 If you have changed &%host_lookup_order%& so that &`bydns`& is not the first
 mechanism in the list, then this variable will be false.

-.wen

 
 
 .vitem &$sender_host_name$&
 
 
 .vitem &$sender_host_name$&


@@ -12181,7 +12177,6 @@ command in a filter file. Its use is explained in the description of that
 command, which can be found in the separate document entitled &'Exim's
 interfaces to mail filtering'&.
 
 command, which can be found in the separate document entitled &'Exim's
 interfaces to mail filtering'&.
 

-.new

 .vitem &$tls_in_bits$&
 .vindex "&$tls_in_bits$&"
 Contains an approximation of the TLS cipher's bit-strength
 .vitem &$tls_in_bits$&
 .vindex "&$tls_in_bits$&"
 Contains an approximation of the TLS cipher's bit-strength


@@ -12280,7 +12275,6 @@ the outbound.
 During outbound
 SMTP deliveries, this variable reflects the value of the &%tls_sni%& option on
 the transport.
 During outbound
 SMTP deliveries, this variable reflects the value of the &%tls_sni%& option on
 the transport.

-.wen

 
 .vitem &$tod_bsdinbox$&
 .vindex "&$tod_bsdinbox$&"
 
 .vitem &$tod_bsdinbox$&
 .vindex "&$tod_bsdinbox$&"


@@ -12323,13 +12317,11 @@ This variable contains the numerical value of the local timezone, for example:
 This variable contains the UTC date and time in &"Zulu"& format, as specified
 by ISO 8601, for example: 20030221154023Z.
 
 This variable contains the UTC date and time in &"Zulu"& format, as specified
 by ISO 8601, for example: 20030221154023Z.
 

-.new

 .vitem &$transport_name$&
 .cindex "transport" "name"
 .cindex "name" "of transport"
 .vindex "&$transport_name$&"
 During the running of a transport, this variable contains its name.
 .vitem &$transport_name$&
 .cindex "transport" "name"
 .cindex "name" "of transport"
 .vindex "&$transport_name$&"
 During the running of a transport, this variable contains its name.

-.wen

 
 .vitem &$value$&
 .vindex "&$value$&"
 
 .vitem &$value$&
 .vindex "&$value$&"


@@ -13039,7 +13031,7 @@ listed in more than one group.
 .section "TLS" "SECID108"
 .table2
 .row &%gnutls_compat_mode%&          "use GnuTLS compatibility mode"
 .section "TLS" "SECID108"
 .table2
 .row &%gnutls_compat_mode%&          "use GnuTLS compatibility mode"

-.row &%gnutls_enable_pkcs11%&        "allow GnuTLS to autoload PKCS11 modules"
+.row &%gnutls_allow_auto_pkcs11%&    "allow GnuTLS to autoload PKCS11 modules"

 .row &%openssl_options%&             "adjust OpenSSL compatibility options"
 .row &%tls_advertise_hosts%&         "advertise TLS to these hosts"
 .row &%tls_certificate%&             "location of server certificate"
 .row &%openssl_options%&             "adjust OpenSSL compatibility options"
 .row &%tls_advertise_hosts%&         "advertise TLS to these hosts"
 .row &%tls_certificate%&             "location of server certificate"


@@ -13186,10 +13178,10 @@ See also the &'Policy controls'& section above.
 .row &%disable_ipv6%&                "do no IPv6 processing"
 .row &%dns_again_means_nonexist%&    "for broken domains"
 .row &%dns_check_names_pattern%&     "pre-DNS syntax check"
 .row &%disable_ipv6%&                "do no IPv6 processing"
 .row &%dns_again_means_nonexist%&    "for broken domains"
 .row &%dns_check_names_pattern%&     "pre-DNS syntax check"

+.row &%dns_dnssec_ok%&               "parameter for resolver"

 .row &%dns_ipv4_lookup%&             "only v4 lookup for these domains"
 .row &%dns_retrans%&                 "parameter for resolver"
 .row &%dns_retry%&                   "parameter for resolver"
 .row &%dns_ipv4_lookup%&             "only v4 lookup for these domains"
 .row &%dns_retrans%&                 "parameter for resolver"
 .row &%dns_retry%&                   "parameter for resolver"

-.row &%dns_use_dnssec%&              "parameter for resolver"

 .row &%dns_use_edns0%&               "parameter for resolver"
 .row &%hold_domains%&                "hold delivery for these domains"
 .row &%local_interfaces%&            "for routing checks"
 .row &%dns_use_edns0%&               "parameter for resolver"
 .row &%hold_domains%&                "hold delivery for these domains"
 .row &%local_interfaces%&            "for routing checks"


@@ -13252,12 +13244,10 @@ A more detailed analysis of the issues is provided by Dan Bernstein:
 &url(http://cr.yp.to/smtp/8bitmime.html)
 .endd
 
 &url(http://cr.yp.to/smtp/8bitmime.html)
 .endd
 

-.new

 To log received 8BITMIME status use
 .code
 log_selector = +8bitmime
 .endd
 To log received 8BITMIME status use
 .code
 log_selector = +8bitmime
 .endd

-.wen

 
 .option acl_not_smtp main string&!! unset
 .cindex "&ACL;" "for non-SMTP messages"
 
 .option acl_not_smtp main string&!! unset
 .cindex "&ACL;" "for non-SMTP messages"


@@ -13688,6 +13678,9 @@ a very large time at the end of the list. For example:
 .code
 delay_warning = 2h:12h:99d
 .endd
 .code
 delay_warning = 2h:12h:99d
 .endd

+Note that the option is only evaluated at the time a delivery attempt fails,
+which depends on retry and queue-runner configuration.
+Typically retries will be configured more frequently than warning messages.

 
 .option delay_warning_condition main string&!! "see below"
 .vindex "&$domain$&"
 
 .option delay_warning_condition main string&!! "see below"
 .vindex "&$domain$&"


@@ -13809,6 +13802,17 @@ This option controls whether or not an IP address, given as a CSA domain, is
 reversed and looked up in the reverse DNS, as described in more detail in
 section &<<SECTverifyCSA>>&.
 
 reversed and looked up in the reverse DNS, as described in more detail in
 section &<<SECTverifyCSA>>&.
 

+
+.option dns_dnssec_ok main integer -1
+.cindex "DNS" "resolver options"
+.cindex "DNS" "DNSSEC"
+If this option is set to a non-negative number then Exim will initialise the
+DNS resolver library to either use or not use DNSSEC, overriding the system
+default. A value of 0 coerces DNSSEC off, a value of 1 coerces DNSSEC on.
+
+If the resolver library does not support DNSSEC then this option has no effect.
+
+

 .option dns_ipv4_lookup main "domain list&!!" unset
 .cindex "IPv6" "DNS lookup for AAAA records"
 .cindex "DNS" "IPv6 lookup for AAAA records"
 .option dns_ipv4_lookup main "domain list&!!" unset
 .cindex "IPv6" "DNS lookup for AAAA records"
 .cindex "DNS" "IPv6 lookup for AAAA records"


@@ -13839,18 +13843,6 @@ to set in them.
 See &%dns_retrans%& above.
 
 
 See &%dns_retrans%& above.
 
 

-.new
-.option dns_use_dnssec main integer -1
-.cindex "DNS" "resolver options"
-.cindex "DNS" "DNSSEC"
-If this option is set to a non-negative number then Exim will initialise the
-DNS resolver library to either use or not use DNSSEC, overriding the system
-default. A value of 0 coerces DNSSEC off, a value of 1 coerces DNSSEC on.
-
-If the resolver library does not support DNSSEC then this option has no effect.
-.wen
-
-

 .option dns_use_edns0 main integer -1
 .cindex "DNS" "resolver options"
 .cindex "DNS" "EDNS0"
 .option dns_use_edns0 main integer -1
 .cindex "DNS" "resolver options"
 .cindex "DNS" "EDNS0"


@@ -14076,15 +14068,13 @@ server. This reduces security slightly, but improves interworking with older
 implementations of TLS.
 
 
 implementations of TLS.
 
 

-.new
-option gnutls_enable_pkcs11 main boolean unset
+option gnutls_allow_auto_pkcs11 main boolean unset

 This option will let GnuTLS (2.12.0 or later) autoload PKCS11 modules with
 the p11-kit configuration files in &_/etc/pkcs11/modules/_&.
 
 See
 &url(http://www.gnutls.org/manual/gnutls.html#Smart-cards-and-HSMs)
 for documentation.
 This option will let GnuTLS (2.12.0 or later) autoload PKCS11 modules with
 the p11-kit configuration files in &_/etc/pkcs11/modules/_&.
 
 See
 &url(http://www.gnutls.org/manual/gnutls.html#Smart-cards-and-HSMs)
 for documentation.

-.wen

 
 
 
 
 
 


@@ -14838,9 +14828,7 @@ Possible options may include:
 .next
 &`no_tlsv1_2`&
 .next
 .next
 &`no_tlsv1_2`&
 .next

-.new

 &`safari_ecdhe_ecdsa_bug`&
 &`safari_ecdhe_ecdsa_bug`&

-.wen

 .next
 &`single_dh_use`&
 .next
 .next
 &`single_dh_use`&
 .next


@@ -14857,14 +14845,12 @@ Possible options may include:
 &`tls_rollback_bug`&
 .endlist
 
 &`tls_rollback_bug`&
 .endlist
 

-.new

 As an aside, the &`safari_ecdhe_ecdsa_bug`& item is a misnomer and affects
 all clients connecting using the MacOS SecureTransport TLS facility prior
 to MacOS 10.8.4, including email clients.  If you see old MacOS clients failing
 to negotiate TLS then this option value might help, provided that your OpenSSL
 release is new enough to contain this work-around.  This may be a situation
 where you have to upgrade OpenSSL to get buggy clients working.
 As an aside, the &`safari_ecdhe_ecdsa_bug`& item is a misnomer and affects
 all clients connecting using the MacOS SecureTransport TLS facility prior
 to MacOS 10.8.4, including email clients.  If you see old MacOS clients failing
 to negotiate TLS then this option value might help, provided that your OpenSSL
 release is new enough to contain this work-around.  This may be a situation
 where you have to upgrade OpenSSL to get buggy clients working.

-.wen

 
 
 .option oracle_servers main "string list" unset
 
 
 .option oracle_servers main "string list" unset


@@ -16135,7 +16121,6 @@ The available primes are:
 Some of these will be too small to be accepted by clients.
 Some may be too large to be accepted by clients.
 
 Some of these will be too small to be accepted by clients.
 Some may be too large to be accepted by clients.
 

-.new

 The TLS protocol does not negotiate an acceptable size for this; clients tend
 to hard-drop connections if what is offered by the server is unacceptable,
 whether too large or too small, and there's no provision for the client to
 The TLS protocol does not negotiate an acceptable size for this; clients tend
 to hard-drop connections if what is offered by the server is unacceptable,
 whether too large or too small, and there's no provision for the client to


@@ -16150,7 +16135,6 @@ used to set its &`DH_MAX_P_BITS`& upper-bound to 2236.  This affects many
 mail user agents (MUAs). The lower bound comes from Debian installs of Exim4
 prior to the 4.80 release, as Debian used to patch Exim to raise the minimum
 acceptable bound from 1024 to 2048.
 mail user agents (MUAs). The lower bound comes from Debian installs of Exim4
 prior to the 4.80 release, as Debian used to patch Exim to raise the minimum
 acceptable bound from 1024 to 2048.

-.wen

 
 
 .option tls_on_connect_ports main "string list" unset
 
 
 .option tls_on_connect_ports main "string list" unset


@@ -16219,10 +16203,8 @@ use OpenSSL with a directory.
 
 See &<<SECTtlssni>>& for discussion of when this option might be re-expanded.
 
 
 See &<<SECTtlssni>>& for discussion of when this option might be re-expanded.
 

-.new

 A forced expansion failure or setting to an empty string is equivalent to
 being unset.
 A forced expansion failure or setting to an empty string is equivalent to
 being unset.

-.wen

 
 
 .option tls_verify_hosts main "host list&!!" unset
 
 
 .option tls_verify_hosts main "host list&!!" unset


@@ -16745,11 +16727,12 @@ and the discussion in chapter &<<CHAPenvironment>>&.
 
 
 
 
 
 

-.option headers_add routers string&!! unset
+.option headers_add routers list&!! unset

 .cindex "header lines" "adding"
 .cindex "router" "adding header lines"
 .cindex "header lines" "adding"
 .cindex "router" "adding header lines"

-This option specifies a string of text that is expanded at routing time, and
-associated with any addresses that are accepted by the router. However, this
+This option specifies a list of text headers, newline-separated,
+that is associated with any addresses that are accepted by the router.
+Each item is separately expanded, at routing time.  However, this

 option has no effect when an address is just being verified. The way in which
 the text is used to add header lines at transport time is described in section
 &<<SECTheadersaddrem>>&. New header lines are not actually added until the
 option has no effect when an address is just being verified. The way in which
 the text is used to add header lines at transport time is described in section
 &<<SECTheadersaddrem>>&. New header lines are not actually added until the


@@ -16758,14 +16741,12 @@ header lines in string expansions in the transport's configuration do not
 &"see"& the added header lines.
 
 The &%headers_add%& option is expanded after &%errors_to%&, but before
 &"see"& the added header lines.
 
 The &%headers_add%& option is expanded after &%errors_to%&, but before

-&%headers_remove%& and &%transport%&. If the expanded string is empty, or if
-the expansion is forced to fail, the option has no effect. Other expansion
+&%headers_remove%& and &%transport%&. If an item is empty, or if
+an item expansion is forced to fail, the item has no effect. Other expansion

 failures are treated as configuration errors.
 
 failures are treated as configuration errors.
 

-.new

 Unlike most options, &%headers_add%& can be specified multiple times
 for a router; all listed headers are added.
 Unlike most options, &%headers_add%& can be specified multiple times
 for a router; all listed headers are added.

-.wen

 
 &*Warning 1*&: The &%headers_add%& option cannot be used for a &(redirect)&
 router that has the &%one_time%& option set.
 
 &*Warning 1*&: The &%headers_add%& option cannot be used for a &(redirect)&
 router that has the &%one_time%& option set.


@@ -16783,11 +16764,12 @@ avoided. The &%repeat_use%& option of the &%redirect%& router may be of help.
 
 
 
 
 
 

-.option headers_remove routers string&!! unset
+.option headers_remove routers list&!! unset

 .cindex "header lines" "removing"
 .cindex "router" "removing header lines"
 .cindex "header lines" "removing"
 .cindex "router" "removing header lines"

-This option specifies a string of text that is expanded at routing time, and
-associated with any addresses that are accepted by the router. However, this
+This option specifies a list of text headers, colon-separated,
+that is associated with any addresses that are accepted by the router.
+Each item is separately expanded, at routing time.  However, this

 option has no effect when an address is just being verified. The way in which
 the text is used to remove header lines at transport time is described in
 section &<<SECTheadersaddrem>>&. Header lines are not actually removed until
 option has no effect when an address is just being verified. The way in which
 the text is used to remove header lines at transport time is described in
 section &<<SECTheadersaddrem>>&. Header lines are not actually removed until


@@ -16796,8 +16778,8 @@ to header lines in string expansions in the transport's configuration still
 &"see"& the original header lines.
 
 The &%headers_remove%& option is expanded after &%errors_to%& and
 &"see"& the original header lines.
 
 The &%headers_remove%& option is expanded after &%errors_to%& and

-&%headers_add%&, but before &%transport%&. If the expansion is forced to fail,
-the option has no effect. Other expansion failures are treated as configuration
+&%headers_add%&, but before &%transport%&. If an item expansion is forced to fail,
+the item has no effect. Other expansion failures are treated as configuration

 errors.
 
 Unlike most options, &%headers_remove%& can be specified multiple times
 errors.
 
 Unlike most options, &%headers_remove%& can be specified multiple times


@@ -17440,7 +17422,7 @@ Setting this option has the effect of setting &%verify_sender%& and
 .oindex "&%-bv%&"
 .cindex "router" "used only when verifying"
 If this option is set, the router is used only when verifying an address,
 .oindex "&%-bv%&"
 .cindex "router" "used only when verifying"
 If this option is set, the router is used only when verifying an address,

-.new "delivering in cutthrough mode or"
+delivering in cutthrough mode or

 testing with the &%-bv%& option, not when actually doing a delivery, testing
 with the &%-bt%& option, or running the SMTP EXPN command. It can be further
 restricted to verifying only senders or recipients by means of
 testing with the &%-bv%& option, not when actually doing a delivery, testing
 with the &%-bt%& option, or running the SMTP EXPN command. It can be further
 restricted to verifying only senders or recipients by means of


@@ -17640,6 +17622,29 @@ when there is a DNS lookup error.
 
 
 
 
 
 

+.option dnssec_request_domains dnslookup "domain list&!!" unset
+.cindex "MX record" "security"
+.cindex "DNSSEC" "MX lookup"
+.cindex "security" "MX lookup"
+.cindex "DNS" "DNSSEC"
+DNS lookups for domains matching &%dnssec_request_domains%& will be done with
+the dnssec request bit set.
+This applies to all of the SRV, MX A6, AAAA, A lookup sequence.
+
+
+
+.option dnssec_require_domains dnslookup "domain list&!!" unset
+.cindex "MX record" "security"
+.cindex "DNSSEC" "MX lookup"
+.cindex "security" "MX lookup"
+.cindex "DNS" "DNSSEC"
+DNS lookups for domains matching &%dnssec_request_domains%& will be done with
+the dnssec request bit set.  Any returns not having the Authenticated Data bit
+(AD bit) set wil be ignored and logged as a host-lookup failure.
+This applies to all of the SRV, MX A6, AAAA, A lookup sequence.
+
+
+

 .option mx_domains dnslookup "domain list&!!" unset
 .cindex "MX record" "required to exist"
 .cindex "SRV record" "required to exist"
 .option mx_domains dnslookup "domain list&!!" unset
 .cindex "MX record" "required to exist"
 .cindex "SRV record" "required to exist"


@@ -18811,7 +18816,6 @@ quote just the command. An item such as
 .endd
 is interpreted as a pipe with a rather strange command name, and no arguments.
 
 .endd
 is interpreted as a pipe with a rather strange command name, and no arguments.
 

-.new

 Note that the above example assumes that the text comes from a lookup source
 of some sort, so that the quotes are part of the data.  If composing a
 redirect router with a &%data%& option directly specifying this command, the
 Note that the above example assumes that the text comes from a lookup source
 of some sort, so that the quotes are part of the data.  If composing a
 redirect router with a &%data%& option directly specifying this command, the


@@ -18821,7 +18825,6 @@ are two main approaches to get around this: escape quotes to be part of the
 data itself, or avoid using this mechanism and instead create a custom
 transport with the &%command%& option set and reference that transport from
 an &%accept%& router.
 data itself, or avoid using this mechanism and instead create a custom
 transport with the &%command%& option set and reference that transport from
 an &%accept%& router.

-.wen

 
 .next
 .cindex "file" "in redirection list"
 
 .next
 .cindex "file" "in redirection list"


@@ -19763,10 +19766,8 @@ so on when debugging driver configurations. For example, if a &%headers_add%&
 option is not working properly, &%debug_print%& could be used to output the
 variables it references. A newline is added to the text if it does not end with
 one.
 option is not working properly, &%debug_print%& could be used to output the
 variables it references. A newline is added to the text if it does not end with
 one.

-.new

 The variables &$transport_name$& and &$router_name$& contain the name of the
 transport and the router that called it.
 The variables &$transport_name$& and &$router_name$& contain the name of the
 transport and the router that called it.

-.wen

 
 .option delivery_date_add transports boolean false
 .cindex "&'Delivery-date:'& header line"
 
 .option delivery_date_add transports boolean false
 .cindex "&'Delivery-date:'& header line"


@@ -19801,20 +19802,19 @@ value that the router supplies, and also overriding any value associated with
 &%user%& (see below).
 
 
 &%user%& (see below).
 
 

-.option headers_add transports string&!! unset
+.option headers_add transports list&!! unset

 .cindex "header lines" "adding in transport"
 .cindex "transport" "header lines; adding"
 .cindex "header lines" "adding in transport"
 .cindex "transport" "header lines; adding"

-This option specifies a string of text that is expanded and added to the header
+This option specifies a list of text headers, newline-separated,
+which are (separately) expanded and added to the header

 portion of a message as it is transported, as described in section
 &<<SECTheadersaddrem>>&. Additional header lines can also be specified by
 routers. If the result of the expansion is an empty string, or if the expansion
 is forced to fail, no action is taken. Other expansion failures are treated as
 errors and cause the delivery to be deferred.
 
 portion of a message as it is transported, as described in section
 &<<SECTheadersaddrem>>&. Additional header lines can also be specified by
 routers. If the result of the expansion is an empty string, or if the expansion
 is forced to fail, no action is taken. Other expansion failures are treated as
 errors and cause the delivery to be deferred.
 

-.new

 Unlike most options, &%headers_add%& can be specified multiple times
 for a transport; all listed headers are added.
 Unlike most options, &%headers_add%& can be specified multiple times
 for a transport; all listed headers are added.

-.wen

 
 
 .option headers_only transports boolean false
 
 
 .option headers_only transports boolean false


@@ -19827,18 +19827,20 @@ transports, the settings of &%message_prefix%& and &%message_suffix%& should be
 checked, since this option does not automatically suppress them.
 
 
 checked, since this option does not automatically suppress them.
 
 

-.option headers_remove transports string&!! unset
+.option headers_remove transports list&!! unset

 .cindex "header lines" "removing"
 .cindex "transport" "header lines; removing"
 .cindex "header lines" "removing"
 .cindex "transport" "header lines; removing"

-This option specifies a string that is expanded into a list of header names;
+This option specifies a list of header names, colon-separated;

 these headers are omitted from the message as it is transported, as described
 in section &<<SECTheadersaddrem>>&. Header removal can also be specified by
 these headers are omitted from the message as it is transported, as described
 in section &<<SECTheadersaddrem>>&. Header removal can also be specified by

-routers. If the result of the expansion is an empty string, or if the expansion
+routers.
+Each list item is separately expanded.
+If the result of the expansion is an empty string, or if the expansion

 is forced to fail, no action is taken. Other expansion failures are treated as
 errors and cause the delivery to be deferred.
 
 Unlike most options, &%headers_remove%& can be specified multiple times
 is forced to fail, no action is taken. Other expansion failures are treated as
 errors and cause the delivery to be deferred.
 
 Unlike most options, &%headers_remove%& can be specified multiple times

-for a router; all listed headers are added.
+for a router; all listed headers are removed.

 
 
 
 
 
 


@@ -21871,7 +21873,6 @@ inserted in the argument list at that point &'as a separate argument'&. This
 avoids any problems with spaces or shell metacharacters, and is of use when a
 &(pipe)& transport is handling groups of addresses in a batch.
 
 avoids any problems with spaces or shell metacharacters, and is of use when a
 &(pipe)& transport is handling groups of addresses in a batch.
 

-.new

 If &%force_command%& is enabled on the transport, Special handling takes place
 for an argument that consists of precisely the text &`$address_pipe`&.  It
 is handled similarly to &$pipe_addresses$& above.  It is expanded and each
 If &%force_command%& is enabled on the transport, Special handling takes place
 for an argument that consists of precisely the text &`$address_pipe`&.  It
 is handled similarly to &$pipe_addresses$& above.  It is expanded and each


@@ -21880,7 +21881,6 @@ argument is inserted in the argument list at that point
 the only item in the argument; in fact, if it were then &%force_command%&
 should behave as a no-op.  Rather, it should be used to adjust the command
 run while preserving the argument vector separation.
 the only item in the argument; in fact, if it were then &%force_command%&
 should behave as a no-op.  Rather, it should be used to adjust the command
 run while preserving the argument vector separation.

-.wen

 
 After splitting up into arguments and expansion, the resulting command is run
 in a subprocess directly from the transport, &'not'& under a shell. The
 
 After splitting up into arguments and expansion, the resulting command is run
 in a subprocess directly from the transport, &'not'& under a shell. The


@@ -22034,7 +22034,6 @@ a bounce message is sent. If &%freeze_signal%& is set, the message will be
 frozen in Exim's queue instead.
 
 
 frozen in Exim's queue instead.
 
 

-.new

 .option force_command pipe boolean false
 .cindex "force command"
 .cindex "&(pipe)& transport", "force command"
 .option force_command pipe boolean false
 .cindex "force command"
 .cindex "&(pipe)& transport", "force command"


@@ -22051,7 +22050,6 @@ force_command
 Note that &$address_pipe$& is handled specially in &%command%& when
 &%force_command%& is set, expanding out to the original argument vector as
 separate items, similarly to a Unix shell &`"$@"`& construct.
 Note that &$address_pipe$& is handled specially in &%command%& when
 &%force_command%& is set, expanding out to the original argument vector as
 separate items, similarly to a Unix shell &`"$@"`& construct.

-.wen

 
 .option ignore_status pipe boolean false
 If this option is true, the status returned by the subprocess that is set up to
 
 .option ignore_status pipe boolean false
 If this option is true, the status returned by the subprocess that is set up to


@@ -22414,10 +22412,8 @@ appropriate values for the outgoing connection, and these are the values that
 are in force when any authenticators are run and when the
 &%authenticated_sender%& option is expanded.
 
 are in force when any authenticators are run and when the
 &%authenticated_sender%& option is expanded.
 

-.new

 These variables are deprecated in favour of &$tls_in_cipher$& et. al.
 and will be removed in a future release.
 These variables are deprecated in favour of &$tls_in_cipher$& et. al.
 and will be removed in a future release.

-.wen

 
 
 .section "Private options for smtp" "SECID146"
 
 
 .section "Private options for smtp" "SECID146"


@@ -22552,7 +22548,6 @@ See the &%search_parents%& option in chapter &<<CHAPdnslookup>>& for more
 details.
 
 
 details.
 
 

-.new

 .option dscp smtp string&!! unset
 .cindex "DCSP" "outbound"
 This option causes the DSCP value associated with a socket to be set to one
 .option dscp smtp string&!! unset
 .cindex "DCSP" "outbound"
 This option causes the DSCP value associated with a socket to be set to one


@@ -22566,7 +22561,6 @@ The outbound packets from Exim will be marked with this value in the header
 that these values will have any effect, not be stripped by networking
 equipment, or do much of anything without cooperation with your Network
 Engineer and those of all network operators between the source and destination.
 that these values will have any effect, not be stripped by networking
 equipment, or do much of anything without cooperation with your Network
 Engineer and those of all network operators between the source and destination.

-.wen

 
 
 .option fallback_hosts smtp "string list" unset
 
 
 .option fallback_hosts smtp "string list" unset


@@ -22701,14 +22695,12 @@ that matches this list, even if the server host advertises PIPELINING support.
 Exim will not try to start a TLS session when delivering to any host that
 matches this list. See chapter &<<CHAPTLS>>& for details of TLS.
 
 Exim will not try to start a TLS session when delivering to any host that
 matches this list. See chapter &<<CHAPTLS>>& for details of TLS.
 

-.new

 .option hosts_verify_avoid_tls smtp "host list&!!" *
 .cindex "TLS" "avoiding for certain hosts"
 Exim will not try to start a TLS session for a verify callout,
 or when delivering in cutthrough mode,
 to any host that matches this list.
 Note that the default is to not use TLS.
 .option hosts_verify_avoid_tls smtp "host list&!!" *
 .cindex "TLS" "avoiding for certain hosts"
 Exim will not try to start a TLS session for a verify callout,
 or when delivering in cutthrough mode,
 to any host that matches this list.
 Note that the default is to not use TLS.

-.wen

 
 
 .option hosts_max_try smtp integer 5
 
 
 .option hosts_max_try smtp integer 5


@@ -22974,7 +22966,6 @@ This option specifies a certificate revocation list. The expanded value must
 be the name of a file that contains a CRL in PEM format.
 
 
 be the name of a file that contains a CRL in PEM format.
 
 

-.new

 .option tls_dh_min_bits smtp integer 1024
 .cindex "TLS" "Diffie-Hellman minimum acceptable size"
 When establishing a TLS session, if a ciphersuite which uses Diffie-Hellman
 .option tls_dh_min_bits smtp integer 1024
 .cindex "TLS" "Diffie-Hellman minimum acceptable size"
 When establishing a TLS session, if a ciphersuite which uses Diffie-Hellman


@@ -22984,7 +22975,6 @@ If the parameter offered by the server is too small, then the TLS handshake
 will fail.
 
 Only supported when using GnuTLS.
 will fail.
 
 Only supported when using GnuTLS.

-.wen

 
 
 .option tls_privatekey smtp string&!! unset
 
 
 .option tls_privatekey smtp string&!! unset


@@ -23045,6 +23035,14 @@ unknown state), opens a new one to the same host, and then tries the delivery
 in clear.
 
 
 in clear.
 
 

+.option tls_try_verify_hosts smtp "host list&!! unset
+.cindex "TLS" "server certificate verification"
+.cindex "certificate" "verification of server"
+This option gives a list of hosts for which, on encrypted connections,
+certificate verification will be tried but need not succeed.
+The &%tls_verify_certificates%& option must also be set.
+
+

 .option tls_verify_certificates smtp string&!! unset
 .cindex "TLS" "server certificate verification"
 .cindex "certificate" "verification of server"
 .option tls_verify_certificates smtp string&!! unset
 .cindex "TLS" "server certificate verification"
 .cindex "certificate" "verification of server"


@@ -23059,6 +23057,20 @@ single file if you are using GnuTLS. The values of &$host$& and
 &$host_address$& are set to the name and address of the server during the
 expansion of this option. See chapter &<<CHAPTLS>>& for details of TLS.
 
 &$host_address$& are set to the name and address of the server during the
 expansion of this option. See chapter &<<CHAPTLS>>& for details of TLS.
 

+For back-compatability,
+if neither tls_verify_hosts nor tls_try_verify_hosts are set
+and certificate verification fails the TLS connection is closed.
+
+
+.option tls_verify_hosts smtp "host list&!! unset
+.cindex "TLS" "server certificate verification"
+.cindex "certificate" "verification of server"
+This option gives a list of hosts for which. on encrypted connections,
+certificate verification must succeed.
+The &%tls_verify_certificates%& option must also be set.
+If both this option and &%tls_try_verify_hosts%& are unset
+operation is as if this option selected all hosts.
+

 
 
 
 
 
 


@@ -24295,12 +24307,10 @@ client_condition = ${if !eq{$tls_out_cipher}{}}
 .endd
 
 
 .endd
 
 

-.new

 .option client_set_id authenticators string&!! unset
 When client authentication succeeds, this condition is expanded; the
 result is used in the log lines for outbound messasges.
 Typically it will be the user name used for authentication.
 .option client_set_id authenticators string&!! unset
 When client authentication succeeds, this condition is expanded; the
 result is used in the log lines for outbound messasges.
 Typically it will be the user name used for authentication.

-.wen

 
 
 .option driver authenticators string unset
 
 
 .option driver authenticators string unset


@@ -24671,7 +24681,6 @@ expansion is &"1"&, &"yes"&, or &"true"&, authentication succeeds and the
 generic &%server_set_id%& option is expanded and saved in &$authenticated_id$&.
 For any other result, a temporary error code is returned, with the expanded
 string as the error text
 generic &%server_set_id%& option is expanded and saved in &$authenticated_id$&.
 For any other result, a temporary error code is returned, with the expanded
 string as the error text

-.new ", and the failed id saved in &$authenticated_fail_id$&."

 
 &*Warning*&: If you use a lookup in the expansion to find the user's
 password, be sure to make the authentication fail if the user is unknown.
 
 &*Warning*&: If you use a lookup in the expansion to find the user's
 password, be sure to make the authentication fail if the user is unknown.


@@ -25547,12 +25556,10 @@ option).
 The &%tls_require_ciphers%& options operate differently, as described in the
 sections &<<SECTreqciphssl>>& and &<<SECTreqciphgnu>>&.
 .next
 The &%tls_require_ciphers%& options operate differently, as described in the
 sections &<<SECTreqciphssl>>& and &<<SECTreqciphgnu>>&.
 .next

-.new

 The &%tls_dh_min_bits%& SMTP transport option is only honoured by GnuTLS.
 When using OpenSSL, this option is ignored.
 (If an API is found to let OpenSSL be configured in this way,
 let the Exim Maintainers know and we'll likely use it).
 The &%tls_dh_min_bits%& SMTP transport option is only honoured by GnuTLS.
 When using OpenSSL, this option is ignored.
 (If an API is found to let OpenSSL be configured in this way,
 let the Exim Maintainers know and we'll likely use it).

-.wen

 .next
 Some other recently added features may only be available in one or the other.
 This should be documented with the feature.  If the documentation does not
 .next
 Some other recently added features may only be available in one or the other.
 This should be documented with the feature.  If the documentation does not


@@ -25855,10 +25862,8 @@ example, OpenSSL uses the name DES-CBC3-SHA for the cipher suite which in other
 contexts is known as TLS_RSA_WITH_3DES_EDE_CBC_SHA. Check the OpenSSL or GnuTLS
 documentation for more details.
 
 contexts is known as TLS_RSA_WITH_3DES_EDE_CBC_SHA. Check the OpenSSL or GnuTLS
 documentation for more details.
 

-.new

 For outgoing SMTP deliveries, &$tls_out_cipher$& is used and logged
 (again depending on the &%tls_cipher%& log selector).
 For outgoing SMTP deliveries, &$tls_out_cipher$& is used and logged
 (again depending on the &%tls_cipher%& log selector).

-.wen

 
 
 .section "Requesting and verifying client certificates" "SECID183"
 
 
 .section "Requesting and verifying client certificates" "SECID183"


@@ -25967,6 +25972,12 @@ for OpenSSL only (not GnuTLS), a directory, that contains a collection of
 expected server certificates. The client verifies the server's certificate
 against this collection, taking into account any revoked certificates that are
 in the list defined by &%tls_crl%&.
 expected server certificates. The client verifies the server's certificate
 against this collection, taking into account any revoked certificates that are
 in the list defined by &%tls_crl%&.

+Failure to verify fails the TLS connection unless either of the
+&%tls_verify_hosts%& or &%tls_try_verify_hosts%& options are set.
+
+The &%tls_verify_hosts%& and &%tls_try_verify_hosts%& options restrict
+certificate verification to the listed servers.  Verification either must
+or need not succeed respectively.

 
 If
 &%tls_require_ciphers%& is set on the &(smtp)& transport, it must contain a
 
 If
 &%tls_require_ciphers%& is set on the &(smtp)& transport, it must contain a


@@ -26144,15 +26155,19 @@ validation to succeed, of course, but if it's not preinstalled, sending the
 root certificate along with the rest makes it available for the user to
 install if the receiving end is a client MUA that can interact with a user.
 
 root certificate along with the rest makes it available for the user to
 install if the receiving end is a client MUA that can interact with a user.
 

+Note that certificates using MD5 are unlikely to work on today's Internet;
+even if your libraries allow loading them for use in Exim when acting as a
+server, increasingly clients will not accept such certificates.  The error
+diagnostics in such a case can be frustratingly vague.
+
+

 
 .section "Self-signed certificates" "SECID187"
 .cindex "certificate" "self-signed"
 You can create a self-signed certificate using the &'req'& command provided
 with OpenSSL, like this:
 
 .section "Self-signed certificates" "SECID187"
 .cindex "certificate" "self-signed"
 You can create a self-signed certificate using the &'req'& command provided
 with OpenSSL, like this:

-.new

 . ==== Do not shorten the duration here without reading and considering
 . ==== the text below.  Please leave it at 9999 days.
 . ==== Do not shorten the duration here without reading and considering
 . ==== the text below.  Please leave it at 9999 days.

-.wen

 .code
 openssl req -x509 -newkey rsa:1024 -keyout file1 -out file2 \
             -days 9999 -nodes
 .code
 openssl req -x509 -newkey rsa:1024 -keyout file1 -out file2 \
             -days 9999 -nodes


@@ -26165,7 +26180,6 @@ that you are prompted for, and any use that is made of the key causes more
 prompting for the passphrase. This is not helpful if you are going to use
 this certificate and key in an MTA, where prompting is not possible.
 
 prompting for the passphrase. This is not helpful if you are going to use
 this certificate and key in an MTA, where prompting is not possible.
 

-.new

 . ==== I expect to still be working 26 years from now.  The less technical
 . ==== debt I create, in terms of storing up trouble for my later years, the
 . ==== happier I will be then.  We really have reached the point where we
 . ==== I expect to still be working 26 years from now.  The less technical
 . ==== debt I create, in terms of storing up trouble for my later years, the
 . ==== happier I will be then.  We really have reached the point where we


@@ -26181,7 +26195,6 @@ of the certificate or reconsider your platform deployment.  (At time of
 writing, reducing the duration is the most likely choice, but the inexorable
 progression of time takes us steadily towards an era where this will not
 be a sensible resolution).
 writing, reducing the duration is the most likely choice, but the inexorable
 progression of time takes us steadily towards an era where this will not
 be a sensible resolution).

-.wen

 
 A self-signed certificate made in this way is sufficient for testing, and
 may be adequate for all your requirements if you are mainly interested in
 
 A self-signed certificate made in this way is sufficient for testing, and
 may be adequate for all your requirements if you are mainly interested in


@@ -26381,10 +26394,8 @@ before or after the data) correctly &-- they keep the message on their queues
 and try again later, but that is their problem, though it does waste some of
 your resources.
 
 and try again later, but that is their problem, though it does waste some of
 your resources.
 

-.new

 The &%acl_smtp_data%& ACL is run after both the &%acl_smtp_dkim%& and
 the &%acl_smtp_mime%& ACLs.
 The &%acl_smtp_data%& ACL is run after both the &%acl_smtp_dkim%& and
 the &%acl_smtp_mime%& ACLs.

-.wen

 
 .section "The SMTP DKIM ACL" "SECTDKIMACL"
 The &%acl_smtp_dkim%& ACL is available only when Exim is compiled with DKIM support
 
 .section "The SMTP DKIM ACL" "SECTDKIMACL"
 The &%acl_smtp_dkim%& ACL is available only when Exim is compiled with DKIM support


@@ -26394,11 +26405,9 @@ The ACL test specified by &%acl_smtp_dkim%& happens after a message has been
 received, and is executed for each DKIM signature found in a message.  If not
 otherwise specified, the default action is to accept.
 
 received, and is executed for each DKIM signature found in a message.  If not
 otherwise specified, the default action is to accept.
 

-.new

 This ACL is evaluated before &%acl_smtp_mime%& and &%acl_smtp_data%&.
 
 For details on the operation of DKIM, see chapter &<<CHAPdkim>>&.
 This ACL is evaluated before &%acl_smtp_mime%& and &%acl_smtp_data%&.
 
 For details on the operation of DKIM, see chapter &<<CHAPdkim>>&.

-.wen

 
 
 .section "The SMTP MIME ACL" "SECID194"
 
 
 .section "The SMTP MIME ACL" "SECID194"


@@ -27234,12 +27243,10 @@ all the conditions are true, wherever it appears in an ACL command, whereas
 effect.
 
 
 effect.
 
 

-.new

 .vitem &*remove_header*&&~=&~<&'text'&>
 This modifier specifies one or more header names in a colon-separated list
  that are to be removed from an incoming message, assuming, of course, that
 the message is ultimately accepted. For details, see section &<<SECTremoveheadacl>>&.
 .vitem &*remove_header*&&~=&~<&'text'&>
 This modifier specifies one or more header names in a colon-separated list
  that are to be removed from an incoming message, assuming, of course, that
 the message is ultimately accepted. For details, see section &<<SECTremoveheadacl>>&.

-.wen

 
 
 .vitem &*set*&&~<&'acl_name'&>&~=&~<&'value'&>
 
 
 .vitem &*set*&&~<&'acl_name'&>&~=&~<&'value'&>


@@ -27248,7 +27255,6 @@ This modifier puts a value into one of the ACL variables (see section
 &<<SECTaclvariables>>&).
 
 
 &<<SECTaclvariables>>&).
 
 

-.new

 .vitem &*udpsend*&&~=&~<&'parameters'&>
 This modifier sends a UDP packet, for purposes such as statistics
 collection or behaviour monitoring. The parameters are expanded, and
 .vitem &*udpsend*&&~=&~<&'parameters'&>
 This modifier sends a UDP packet, for purposes such as statistics
 collection or behaviour monitoring. The parameters are expanded, and


@@ -27262,7 +27268,6 @@ when:
 udpsend = <; 2001:dB8::dead:beef ; 1234 ;\
              $tod_zulu $sender_host_address
 .endd
 udpsend = <; 2001:dB8::dead:beef ; 1234 ;\
              $tod_zulu $sender_host_address
 .endd

-.wen

 .endlist
 
 
 .endlist
 
 


@@ -27324,7 +27329,6 @@ Notice that we put back the lower cased version afterwards, assuming that
 is what is wanted for subsequent tests.
 
 
 is what is wanted for subsequent tests.
 
 

-.new

 .vitem &*control&~=&~cutthrough_delivery*&
 .cindex "&ACL;" "cutthrough routing"
 .cindex "cutthrough" "requesting"
 .vitem &*control&~=&~cutthrough_delivery*&
 .cindex "&ACL;" "cutthrough routing"
 .cindex "cutthrough" "requesting"


@@ -27333,7 +27337,16 @@ It is usable in the RCPT ACL and valid only for single-recipient mails forwarded
 from one SMTP connection to another.  If a recipient-verify callout connection is
 requested in the same ACL it is held open and used for the data, otherwise one is made
 after the ACL completes.
 from one SMTP connection to another.  If a recipient-verify callout connection is
 requested in the same ACL it is held open and used for the data, otherwise one is made
 after the ACL completes.

-.new "Note that routers are used in verify mode."
+
+Note that routers are used in verify mode,
+and cannot depend on content of received headers.
+Note also that headers cannot be
+modified by any of the post-data ACLs (DATA, MIME and DKIM).
+Headers may be modified by routers (subject to the above) and transports.
+
+Cutthrough delivery is not supported via transport-filters or when DKIM signing
+of outgoing messages is done, because it sends data to the ultimate destination
+before the entire message has been received from the source.

 
 Should the ultimate destination system positively accept or reject the mail,
 a corresponding indication is given to the source system and nothing is queued.
 
 Should the ultimate destination system positively accept or reject the mail,
 a corresponding indication is given to the source system and nothing is queued.


@@ -27344,10 +27357,8 @@ line.
 
 Delivery in this mode avoids the generation of a bounce mail to a (possibly faked)
 sender when the destination system is doing content-scan based rejection.
 
 Delivery in this mode avoids the generation of a bounce mail to a (possibly faked)
 sender when the destination system is doing content-scan based rejection.

-.wen

 
 
 
 

-.new

 .vitem &*control&~=&~debug/*&<&'options'&>
 .cindex "&ACL;" "enabling debug logging"
 .cindex "debugging" "enabling from an ACL"
 .vitem &*control&~=&~debug/*&<&'options'&>
 .cindex "&ACL;" "enabling debug logging"
 .cindex "debugging" "enabling from an ACL"


@@ -27364,7 +27375,6 @@ contexts):
       control = debug/opts=+expand+acl
       control = debug/tag=.$message_exim_id/opts=+expand
 .endd
       control = debug/opts=+expand+acl
       control = debug/tag=.$message_exim_id/opts=+expand
 .endd

-.wen

 
 
 .vitem &*control&~=&~dkim_disable_verify*&
 
 
 .vitem &*control&~=&~dkim_disable_verify*&


@@ -27374,7 +27384,6 @@ This control turns off DKIM verification processing entirely.  For details on
 the operation and configuration of DKIM, see chapter &<<CHAPdkim>>&.
 
 
 the operation and configuration of DKIM, see chapter &<<CHAPdkim>>&.
 
 

-.new

 .vitem &*control&~=&~dscp/*&<&'value'&>
 .cindex "&ACL;" "setting DSCP value"
 .cindex "DSCP" "inbound"
 .vitem &*control&~=&~dscp/*&<&'value'&>
 .cindex "&ACL;" "setting DSCP value"
 .cindex "DSCP" "inbound"


@@ -27390,7 +27399,6 @@ The outbound packets from Exim will be marked with this value in the header
 that these values will have any effect, not be stripped by networking
 equipment, or do much of anything without cooperation with your Network
 Engineer and those of all network operators between the source and destination.
 that these values will have any effect, not be stripped by networking
 equipment, or do much of anything without cooperation with your Network
 Engineer and those of all network operators between the source and destination.

-.wen

 
 
 .vitem &*control&~=&~enforce_sync*& &&&
 
 
 .vitem &*control&~=&~enforce_sync*& &&&


@@ -27592,12 +27600,15 @@ warn dnslists = sbl.spamhaus.org : \
      add_header = X-blacklisted-at: $dnslist_domain
 .endd
 The &%add_header%& modifier is permitted in the MAIL, RCPT, PREDATA, DATA,
      add_header = X-blacklisted-at: $dnslist_domain
 .endd
 The &%add_header%& modifier is permitted in the MAIL, RCPT, PREDATA, DATA,

-MIME, and non-SMTP ACLs (in other words, those that are concerned with
+MIME, DKIM, and non-SMTP ACLs (in other words, those that are concerned with

 receiving a message). The message must ultimately be accepted for
 &%add_header%& to have any significant effect. You can use &%add_header%& with
 any ACL verb, including &%deny%& (though this is potentially useful only in a
 RCPT ACL).
 
 receiving a message). The message must ultimately be accepted for
 &%add_header%& to have any significant effect. You can use &%add_header%& with
 any ACL verb, including &%deny%& (though this is potentially useful only in a
 RCPT ACL).
 

+Headers will not be added to the message if the modifier is used in
+DATA, MIME or DKIM ACLs for messages delivered by cutthrough routing.
+

 Leading and trailing newlines are removed from
 the data for the &%add_header%& modifier; if it then
 contains one or more newlines that
 Leading and trailing newlines are removed from
 the data for the &%add_header%& modifier; if it then
 contains one or more newlines that


@@ -27629,9 +27640,7 @@ passing data between (for example) the MAIL and RCPT ACLs. If you want to do
 this, you can use ACL variables, as described in section
 &<<SECTaclvariables>>&.
 
 this, you can use ACL variables, as described in section
 &<<SECTaclvariables>>&.
 

-.new

 The list of headers yet to be added is given by the &%$headers_added%& variable.
 The list of headers yet to be added is given by the &%$headers_added%& variable.

-.wen

 
 The &%add_header%& modifier acts immediately as it is encountered during the
 processing of an ACL. Notice the difference between these two cases:
 
 The &%add_header%& modifier acts immediately as it is encountered during the
 processing of an ACL. Notice the difference between these two cases:


@@ -27682,7 +27691,6 @@ system filter or in a router or transport.
 
 
 
 
 
 

-.new

 .section "Removing header lines in ACLs" "SECTremoveheadacl"
 .cindex "header lines" "removing in an ACL"
 .cindex "header lines" "position of removed lines"
 .section "Removing header lines in ACLs" "SECTremoveheadacl"
 .cindex "header lines" "removing in an ACL"
 .cindex "header lines" "position of removed lines"


@@ -27694,12 +27702,15 @@ warn   message        = Remove internal headers
        remove_header  = x-route-mail1 : x-route-mail2
 .endd
 The &%remove_header%& modifier is permitted in the MAIL, RCPT, PREDATA, DATA,
        remove_header  = x-route-mail1 : x-route-mail2
 .endd
 The &%remove_header%& modifier is permitted in the MAIL, RCPT, PREDATA, DATA,

-MIME, and non-SMTP ACLs (in other words, those that are concerned with
+MIME, DKIM, and non-SMTP ACLs (in other words, those that are concerned with

 receiving a message). The message must ultimately be accepted for
 &%remove_header%& to have any significant effect. You can use &%remove_header%&
 with any ACL verb, including &%deny%&, though this is really not useful for
 any verb that doesn't result in a delivered message.
 
 receiving a message). The message must ultimately be accepted for
 &%remove_header%& to have any significant effect. You can use &%remove_header%&
 with any ACL verb, including &%deny%&, though this is really not useful for
 any verb that doesn't result in a delivered message.
 

+Headers will not be removed to the message if the modifier is used in
+DATA, MIME or DKIM ACLs for messages delivered by cutthrough routing.
+

 More than one header can be removed at the same time by using a colon separated
 list of header names. The header matching is case insensitive. Wildcards are
 not permitted, nor is list expansion performed, so you cannot use hostlists to
 More than one header can be removed at the same time by using a colon separated
 list of header names. The header matching is case insensitive. Wildcards are
 not permitted, nor is list expansion performed, so you cannot use hostlists to


@@ -27750,7 +27761,6 @@ are honoured.
 &*Warning*&: This facility currently applies only to header lines that are
 present during ACL processing. It does NOT remove header lines that are added
 in a system filter or in a router or transport.
 &*Warning*&: This facility currently applies only to header lines that are
 present during ACL processing. It does NOT remove header lines that are added
 in a system filter or in a router or transport.

-.wen

 
 
 
 
 
 


@@ -27785,13 +27795,11 @@ condition is on a &%warn%& verb. In that case, a &"defer"& return makes the
 condition false. This means that further processing of the &%warn%& verb
 ceases, but processing of the ACL continues.
 
 condition false. This means that further processing of the &%warn%& verb
 ceases, but processing of the ACL continues.
 

-.new

 If the argument is a named ACL, up to nine space-separated optional values
 can be appended; they appear within the called ACL in $acl_arg1 to $acl_arg9,
 and $acl_narg is set to the count of values.
 Previous values of these variables are restored after the call returns.
 The name and values are expanded separately.
 If the argument is a named ACL, up to nine space-separated optional values
 can be appended; they appear within the called ACL in $acl_arg1 to $acl_arg9,
 and $acl_narg is set to the count of values.
 Previous values of these variables are restored after the call returns.
 The name and values are expanded separately.

-.wen

 
 If the nested &%acl%& returns &"drop"& and the outer condition denies access,
 the connection is dropped. If it returns &"discard"&, the verb must be
 
 If the nested &%acl%& returns &"drop"& and the outer condition denies access,
 the connection is dropped. If it returns &"discard"&, the verb must be


@@ -28023,6 +28031,23 @@ This condition checks whether the sending host (the client) is authorized to
 send email. Details of how this works are given in section
 &<<SECTverifyCSA>>&.
 
 send email. Details of how this works are given in section
 &<<SECTverifyCSA>>&.
 

+.new
+.vitem &*verify&~=&~header_names_ascii*&
+.cindex "&%verify%& ACL condition"
+.cindex "&ACL;" "verifying header names only ASCII"
+.cindex "header lines" "verifying header names only ASCII"
+.cindex "verifying" "header names only ASCII"
+This condition is relevant only in an ACL that is run after a message has been
+received, that is, in an ACL specified by &%acl_smtp_data%& or
+&%acl_not_smtp%&.  It checks all header names (not the content) to make sure
+there are no non-ASCII characters, also excluding control characters.  The
+allowable characters are decimal ASCII values 33 through 126.
+
+Exim itself will handle headers with non-ASCII characters, but it can cause
+problems for downstream applications, so this option will allow their
+detection and rejection in the DATA ACL's.
+.wen
+

 .vitem &*verify&~=&~header_sender/*&<&'options'&>
 .cindex "&%verify%& ACL condition"
 .cindex "&ACL;" "verifying sender in the header"
 .vitem &*verify&~=&~header_sender/*&<&'options'&>
 .cindex "&%verify%& ACL condition"
 .cindex "&ACL;" "verifying sender in the header"


@@ -28634,6 +28659,13 @@ deny   condition = ${if isip4{$sender_host_address}}
        dnslists  = some.list.example
 .endd
 
        dnslists  = some.list.example
 .endd
 

+If an explicit key is being used for a DNS lookup and it may be an IPv6
+address you should specify alternate list separators for both the outer
+(DNS list name) list and inner (lookup keys) list:
+.code
+       dnslists = <; dnsbl.example.com/<|$acl_m_addrslist
+.endd
+

 .section "Rate limiting incoming messages" "SECTratelimiting"
 .cindex "rate limiting" "client sending"
 .cindex "limiting client sending rates"
 .section "Rate limiting incoming messages" "SECTratelimiting"
 .cindex "rate limiting" "client sending"
 .cindex "limiting client sending rates"


@@ -29015,6 +29047,7 @@ router that does not set up hosts routes to an &(smtp)& transport with a
 &%hosts%& setting, the transport's hosts are used. If an &(smtp)& transport has
 &%hosts_override%& set, its hosts are always used, whether or not the router
 supplies a host list.
 &%hosts%& setting, the transport's hosts are used. If an &(smtp)& transport has
 &%hosts_override%& set, its hosts are always used, whether or not the router
 supplies a host list.

+Callouts are only supported on &(smtp)& transports.

 
 The port that is used is taken from the transport, if it is specified and is a
 remote transport. (For routers that do verification only, no transport need be
 
 The port that is used is taken from the transport, if it is specified and is a
 remote transport. (For routers that do verification only, no transport need be


@@ -29036,10 +29069,8 @@ following SMTP commands are sent:
 LHLO is used instead of HELO if the transport's &%protocol%& option is
 set to &"lmtp"&.
 
 LHLO is used instead of HELO if the transport's &%protocol%& option is
 set to &"lmtp"&.
 

-.new

 The callout may use EHLO, AUTH and/or STARTTLS given appropriate option
 settings.
 The callout may use EHLO, AUTH and/or STARTTLS given appropriate option
 settings.

-.wen

 
 A recipient callout check is similar. By default, it also uses an empty address
 for the sender. This default is chosen because most hosts do not make use of
 
 A recipient callout check is similar. By default, it also uses an empty address
 for the sender. This default is chosen because most hosts do not make use of


@@ -29721,7 +29752,6 @@ Exim does not assume that there is a common filesystem with the remote host.
 There is an option WITH_OLD_CLAMAV_STREAM in &_src/EDITME_& available, should
 you be running a version of ClamAV prior to 0.95.
 
 There is an option WITH_OLD_CLAMAV_STREAM in &_src/EDITME_& available, should
 you be running a version of ClamAV prior to 0.95.
 

-.new

 The final example shows that multiple TCP targets can be specified.  Exim will
 randomly use one for each incoming email (i.e. it load balances them).  Note
 that only TCP targets may be used if specifying a list of scanners; a UNIX
 The final example shows that multiple TCP targets can be specified.  Exim will
 randomly use one for each incoming email (i.e. it load balances them).  Note
 that only TCP targets may be used if specifying a list of scanners; a UNIX


@@ -29736,7 +29766,6 @@ email that the down scanner gets chosen first (message wrapped to be readable):
    clamd: connection to localhost, port 3310 failed
    (Connection refused)
 .endd
    clamd: connection to localhost, port 3310 failed
    (Connection refused)
 .endd

-.wen

 
 If the option is unset, the default is &_/tmp/clamd_&. Thanks to David Saez for
 contributing the code for this scanner.
 
 If the option is unset, the default is &_/tmp/clamd_&. Thanks to David Saez for
 contributing the code for this scanner.


@@ -29822,6 +29851,24 @@ av_scanner = mksd:2
 .endd
 You can safely omit this option (the default value is 1).
 
 .endd
 You can safely omit this option (the default value is 1).
 

+.vitem &%sock%&
+.cindex "virus scanners" "simple socket-connected"
+This is a general-purpose way of talking to simple scanner daemons
+running on the local machine.
+There are four options:
+an address (which may be an IP addres and port, or the path of a Unix socket),
+a commandline to send (may include a single %s which will be replaced with
+the path to the mail file to be scanned),
+an RE to trigger on from the returned data,
+an RE to extract malware_name from the returned data.
+For example:
+.code
+av_scanner = sock:127.0.0.1 6001:%s:(SPAM|VIRUS):(.*)\$
+.endd
+Default for the socket specifier is &_/tmp/malware.sock_&.
+Default for the commandline is &_%s\n_&.
+Both regular-expressions are required.
+

 .vitem &%sophie%&
 .cindex "virus scanners" "Sophos and Sophie"
 Sophie is a daemon that uses Sophos' &%libsavi%& library to scan for viruses.
 .vitem &%sophie%&
 .cindex "virus scanners" "Sophos and Sophie"
 Sophie is a daemon that uses Sophos' &%libsavi%& library to scan for viruses.


@@ -31944,7 +31991,7 @@ they do not affect the values of the variables that refer to header lines.
 the transport cannot refer to the modified header lines, because such
 expansions all occur before the message is actually transported.
 
 the transport cannot refer to the modified header lines, because such
 expansions all occur before the message is actually transported.
 

-For both routers and transports, the result of expanding a &%headers_add%&
+For both routers and transports, the argument of a &%headers_add%&

 option must be in the form of one or more RFC 2822 header lines, separated by
 newlines (coded as &"\n"&). For example:
 .code
 option must be in the form of one or more RFC 2822 header lines, separated by
 newlines (coded as &"\n"&). For example:
 .code


@@ -31953,13 +32000,11 @@ headers_add = X-added-header: added by $primary_hostname\n\
 .endd
 Exim does not check the syntax of these added header lines.
 
 .endd
 Exim does not check the syntax of these added header lines.
 

-.new

 Multiple &%headers_add%& options for a single router or transport can be
 Multiple &%headers_add%& options for a single router or transport can be

-specified; the values will be concatenated (with a separating newline
-added) before expansion.
-.wen
+specified; the values will append to a single list of header lines.
+Each header-line is separately expanded.

 
 

-The result of expanding &%headers_remove%& must consist of a colon-separated
+The argument of a &%headers_remove%& option must consist of a colon-separated

 list of header names. This is confusing, because header names themselves are
 often terminated by colons. In this case, the colons are the list separators,
 not part of the names. For example:
 list of header names. This is confusing, because header names themselves are
 often terminated by colons. In this case, the colons are the list separators,
 not part of the names. For example:


@@ -31968,11 +32013,12 @@ headers_remove = return-receipt-to:acknowledge-to
 .endd
 
 Multiple &%headers_remove%& options for a single router or transport can be
 .endd
 
 Multiple &%headers_remove%& options for a single router or transport can be

-specified; the values will be concatenated (with a separating colon
-added) before expansion.
+specified; the arguments will append to a single header-names list.
+Each item is separately expanded.

 
 

-When &%headers_add%& or &%headers_remove%& is specified on a router, its value
-is expanded at routing time, and then associated with all addresses that are
+When &%headers_add%& or &%headers_remove%& is specified on a router,
+items are expanded at routing time,
+and then associated with all addresses that are

 accepted by that router, and also with any new addresses that it generates. If
 an address passes through several routers as a result of aliasing or
 forwarding, the changes are cumulative.
 accepted by that router, and also with any new addresses that it generates. If
 an address passes through several routers as a result of aliasing or
 forwarding, the changes are cumulative.


@@ -33834,9 +33880,7 @@ timestamp. The flags are:
 &`<=`&     message arrival
 &`=>`&     normal message delivery
 &`->`&     additional address in same delivery
 &`<=`&     message arrival
 &`=>`&     normal message delivery
 &`->`&     additional address in same delivery

-.new

 &`>>`&     cutthrough message delivery
 &`>>`&     cutthrough message delivery

-.wen

 &`*>`&     delivery suppressed by &%-N%&
 &`**`&     delivery failed; address bounced
 &`==`&     delivery deferred; temporary problem
 &`*>`&     delivery suppressed by &%-N%&
 &`**`&     delivery failed; address bounced
 &`==`&     delivery deferred; temporary problem


@@ -33936,12 +33980,10 @@ intermediate address(es) exist between the original and the final address, the
 last of these is given in parentheses after the final address. The R and T
 fields record the router and transport that were used to process the address.
 
 last of these is given in parentheses after the final address. The R and T
 fields record the router and transport that were used to process the address.
 

-.new

 If SMTP AUTH was used for the delivery there is an additional item A=
 followed by the name of the authenticator that was used.
 If an authenticated identification was set up by the authenticator's &%client_set_id%&
 option, this is logged too, separated by a colon from the authenticator name.
 If SMTP AUTH was used for the delivery there is an additional item A=
 followed by the name of the authenticator that was used.
 If an authenticated identification was set up by the authenticator's &%client_set_id%&
 option, this is logged too, separated by a colon from the authenticator name.

-.wen

 
 If a shadow transport was run after a successful local delivery, the log line
 for the successful delivery has an item added on the end, of the form
 
 If a shadow transport was run after a successful local delivery, the log line
 for the successful delivery has an item added on the end, of the form


@@ -33958,13 +34000,11 @@ flagged with &`->`& instead of &`=>`&. When two or more messages are delivered
 down a single SMTP connection, an asterisk follows the IP address in the log
 lines for the second and subsequent messages.
 
 down a single SMTP connection, an asterisk follows the IP address in the log
 lines for the second and subsequent messages.
 

-.new

 .cindex "delivery" "cutthrough; logging"
 .cindex "cutthrough" "logging"
 When delivery is done in cutthrough mode it is flagged with &`>>`& and the log
 line precedes the reception line, since cutthrough waits for a possible
 rejection from the destination in case it can reject the sourced item.
 .cindex "delivery" "cutthrough; logging"
 .cindex "cutthrough" "logging"
 When delivery is done in cutthrough mode it is flagged with &`>>`& and the log
 line precedes the reception line, since cutthrough waits for a possible
 rejection from the destination in case it can reject the sourced item.

-.wen

 
 The generation of a reply message by a filter file gets logged as a
 &"delivery"& to the addressee, preceded by &">"&.
 
 The generation of a reply message by a filter file gets logged as a
 &"delivery"& to the addressee, preceded by &">"&.


@@ -34076,6 +34116,7 @@ the following table:
 &`R   `&        on &`<=`& lines: reference for local bounce
 &`    `&        on &`=>`&  &`**`& and &`==`& lines: router name
 &`S   `&        size of message
 &`R   `&        on &`<=`& lines: reference for local bounce
 &`    `&        on &`=>`&  &`**`& and &`==`& lines: router name
 &`S   `&        size of message

+&`SNI `&        server name indication from TLS client hello

 &`ST  `&        shadow transport name
 &`T   `&        on &`<=`& lines: message subject (topic)
 &`    `&        on &`=>`& &`**`& and &`==`& lines: transport name
 &`ST  `&        shadow transport name
 &`T   `&        on &`<=`& lines: message subject (topic)
 &`    `&        on &`=>`& &`**`& and &`==`& lines: transport name


@@ -34142,9 +34183,7 @@ log_selector = +arguments -retry_defer
 The list of optional log items is in the following table, with the default
 selection marked by asterisks:
 .display
 The list of optional log items is in the following table, with the default
 selection marked by asterisks:
 .display

-.new

 &` 8bitmime                   `&  received 8BITMIME status
 &` 8bitmime                   `&  received 8BITMIME status

-.wen

 &`*acl_warn_skipped           `&  skipped &%warn%& statement in ACL
 &` address_rewrite            `&  address rewriting
 &` all_parents                `&  all parents in => lines
 &`*acl_warn_skipped           `&  skipped &%warn%& statement in ACL
 &` address_rewrite            `&  address rewriting
 &` all_parents                `&  all parents in => lines


@@ -34174,14 +34213,10 @@ selection marked by asterisks:
 &`*sender_verify_fail         `&  sender verification failures
 &`*size_reject                `&  rejection because too big
 &`*skip_delivery              `&  delivery skipped in a queue run
 &`*sender_verify_fail         `&  sender verification failures
 &`*size_reject                `&  rejection because too big
 &`*skip_delivery              `&  delivery skipped in a queue run

-.new

 &`*smtp_confirmation          `&  SMTP confirmation on => lines
 &`*smtp_confirmation          `&  SMTP confirmation on => lines

-.wen

 &` smtp_connection            `&  SMTP connections
 &` smtp_incomplete_transaction`&  incomplete SMTP transactions
 &` smtp_connection            `&  SMTP connections
 &` smtp_incomplete_transaction`&  incomplete SMTP transactions

-.new

 &` smtp_mailauth              `&  AUTH argument to MAIL commands
 &` smtp_mailauth              `&  AUTH argument to MAIL commands

-.wen

 &` smtp_no_mail               `&  session with no MAIL commands
 &` smtp_protocol_error        `&  SMTP protocol errors
 &` smtp_syntax_error          `&  SMTP syntax errors
 &` smtp_no_mail               `&  session with no MAIL commands
 &` smtp_protocol_error        `&  SMTP protocol errors
 &` smtp_syntax_error          `&  SMTP syntax errors


@@ -34197,7 +34232,6 @@ selection marked by asterisks:
 More details on each of these items follows:
 
 .ilist
 More details on each of these items follows:
 
 .ilist

-.new

 .cindex "8BITMIME"
 .cindex "log" "8BITMIME"
 &%8bitmime%&: This causes Exim to log any 8BITMIME status of received messages,
 .cindex "8BITMIME"
 .cindex "log" "8BITMIME"
 &%8bitmime%&: This causes Exim to log any 8BITMIME status of received messages,


@@ -34205,7 +34239,6 @@ which may help in tracking down interoperability issues with ancient MTAs
 that are not 8bit clean.  This is added to the &"<="& line, tagged with
 &`M8S=`& and a value of &`0`&, &`7`& or &`8`&, corresponding to "not given",
 &`7BIT`& and &`8BITMIME`& respectively.
 that are not 8bit clean.  This is added to the &"<="& line, tagged with
 &`M8S=`& and a value of &`0`&, &`7`& or &`8`&, corresponding to "not given",
 &`7BIT`& and &`8BITMIME`& respectively.

-.wen

 .next
 .cindex "&%warn%& ACL verb" "log when skipping"
 &%acl_warn_skipped%&: When an ACL &%warn%& statement is skipped because one of
 .next
 .cindex "&%warn%& ACL verb" "log when skipping"
 &%acl_warn_skipped%&: When an ACL &%warn%& statement is skipped because one of


@@ -34393,7 +34426,8 @@ The message that is written is &"spool file is locked"&.
 .next
 .cindex "log" "smtp confirmation"
 .cindex "SMTP" "logging confirmation"
 .next
 .cindex "log" "smtp confirmation"
 .cindex "SMTP" "logging confirmation"

-&%smtp_confirmation%&: The response to the final &"."& in the SMTP dialogue for
+.cindex "LMTP" "logging confirmation"
+&%smtp_confirmation%&: The response to the final &"."& in the SMTP or LMTP dialogue for

 outgoing messages is added to delivery log lines in the form &`C=`&<&'text'&>.
 A number of MTAs (including Exim) return an identifying string in this
 response.
 outgoing messages is added to delivery log lines in the form &`C=`&<&'text'&>.
 A number of MTAs (including Exim) return an identifying string in this
 response.


@@ -34452,12 +34486,10 @@ the last 20 are listed, preceded by &"..."&. However, with the default
 setting of 10 for &%smtp_accep_max_nonmail%&, the connection will in any case
 have been aborted before 20 non-mail commands are processed.
 .next
 setting of 10 for &%smtp_accep_max_nonmail%&, the connection will in any case
 have been aborted before 20 non-mail commands are processed.
 .next

-.new

 &%smtp_mailauth%&: A third subfield with the authenticated sender,
 colon-separated, is appended to the A= item for a message arrival or delivery
 log line, if an AUTH argument to the SMTP MAIL command (see &<<SECTauthparamail>>&)
 was accepted or used.
 &%smtp_mailauth%&: A third subfield with the authenticated sender,
 colon-separated, is appended to the A= item for a message arrival or delivery
 log line, if an AUTH argument to the SMTP MAIL command (see &<<SECTauthparamail>>&)
 was accepted or used.

-.wen

 .next
 .cindex "log" "SMTP protocol error"
 .cindex "SMTP" "logging protocol error"
 .next
 .cindex "log" "SMTP protocol error"
 .cindex "SMTP" "logging protocol error"


@@ -34624,9 +34656,13 @@ This utility is a Perl script contributed by Matt Hubbard. It runs
 .code
 exim -bpu
 .endd
 .code
 exim -bpu
 .endd

-to obtain a queue listing with undelivered recipients only, and then greps the
-output to select messages that match given criteria. The following selection
-options are available:
+or (in case &*-a*& switch is specified)
+.code
+exim -bp
+.endd 
+
+to obtain a queue listing, and then greps the output to select messages 
+that match given criteria. The following selection options are available:

 
 .vlist
 .vitem &*-f*&&~<&'regex'&>
 
 .vlist
 .vitem &*-f*&&~<&'regex'&>


@@ -34673,6 +34709,9 @@ Brief format &-- one line per message.
 
 .vitem &*-R*&
 Display messages in reverse order.
 
 .vitem &*-R*&
 Display messages in reverse order.

+
+.vitem &*-a*&
+Include delivered recipients in queue listing.

 .endlist
 
 There is one more option, &%-h%&, which outputs a list of options.
 .endlist
 
 There is one more option, &%-h%&, which outputs a list of options.


@@ -35861,8 +35900,9 @@ are given in chapter &<<CHAPappendfile>>&.
 
 
 
 
 
 

-.new

 .section "Running local commands" "SECTsecconslocalcmds"
 .section "Running local commands" "SECTsecconslocalcmds"

+.cindex "security" "local commands"
+.cindex "security" "command injection attacks"

 There are a number of ways in which an administrator can configure Exim to run
 commands based upon received, untrustworthy, data. Further, in some
 configurations a user who can control a &_.forward_& file can also arrange to
 There are a number of ways in which an administrator can configure Exim to run
 commands based upon received, untrustworthy, data. Further, in some
 configurations a user who can control a &_.forward_& file can also arrange to


@@ -35903,7 +35943,39 @@ real-world security vulnerabilities caused by its use with untrustworthy data
 injected in, for SQL injection attacks.
 Consider the use of the &%inlisti%& expansion condition instead.
 .endlist
 injected in, for SQL injection attacks.
 Consider the use of the &%inlisti%& expansion condition instead.
 .endlist

-.wen
+
+
+
+
+.section "Trust in configuration data" "SECTsecconfdata"
+.cindex "security" "data sources"
+.cindex "security" "regular expressions"
+.cindex "regular expressions" "security"
+.cindex "PCRE" "security"
+If configuration data for Exim can come from untrustworthy sources, there
+are some issues to be aware of:
+
+.ilist
+Use of &%${expand...}%& may provide a path for shell injection attacks.
+.next
+Letting untrusted data provide a regular expression is unwise.
+.next
+Using &%${match...}%& to apply a fixed regular expression against untrusted
+data may result in pathological behaviour within PCRE.  Be aware of what
+"backtracking" means and consider options for being more strict with a regular
+expression. Avenues to explore include limiting what can match (avoiding &`.`&
+when &`[a-z0-9]`& or other character class will do), use of atomic grouping and
+possessive quantifiers or just not using regular expressions against untrusted
+data.
+.next
+It can be important to correctly use &%${quote:...}%&,
+&%${quote_local_part:...}%& and &%${quote_%&<&'lookup-type'&>&%:...}%& expansion
+items to ensure that data is correctly constructed.
+.next
+Some lookups might return multiple results, even though normal usage is only
+expected to yield one result.
+.endlist
+

 
 
 
 
 
 


@@ -36379,7 +36451,9 @@ disabled by setting DISABLE_DKIM=yes in Local/Makefile.
 Exim's DKIM implementation allows to
 .olist
 Sign outgoing messages: This function is implemented in the SMTP transport.
 Exim's DKIM implementation allows to
 .olist
 Sign outgoing messages: This function is implemented in the SMTP transport.

-It can co-exist with all other Exim features, including transport filters.
+It can co-exist with all other Exim features
+(including transport filters)
+except cutthrough delivery.

 .next
 Verify signatures in incoming messages: This is implemented by an additional
 ACL (acl_smtp_dkim), which can be called several times per message, with
 .next
 Verify signatures in incoming messages: This is implemented by an additional
 ACL (acl_smtp_dkim), which can be called several times per message, with


@@ -36470,6 +36544,10 @@ used.
 Verification of DKIM signatures in incoming email is implemented via the
 &%acl_smtp_dkim%& ACL. By default, this ACL is called once for each
 syntactically(!) correct signature in the incoming message.
 Verification of DKIM signatures in incoming email is implemented via the
 &%acl_smtp_dkim%& ACL. By default, this ACL is called once for each
 syntactically(!) correct signature in the incoming message.

+A missing ACL definition defaults to accept.
+If any ACL call does not acccept, the message is not accepted.
+If a cutthrough delivery was in progress for the message it is
+summarily dropped (having wasted the transmission effort).

 
 To evaluate the signature in the ACL a large number of expansion variables
 containing the signature status and its details are set up during the
 
 To evaluate the signature in the ACL a large number of expansion variables
 containing the signature status and its details are set up during the


@@ -36661,13 +36739,11 @@ Add to &_src/config.h.defaults_& the line:
 Edit &_src/drtables.c_&, adding conditional code to pull in the private header
 and create a table entry as is done for all the other drivers and lookup types.
 .next
 Edit &_src/drtables.c_&, adding conditional code to pull in the private header
 and create a table entry as is done for all the other drivers and lookup types.
 .next

-.new

 Edit &_scripts/lookups-Makefile_& if this is a new lookup; there is a for-loop
 near the bottom, ranging the &`name_mod`& variable over a list of all lookups.
 Add your &`NEWDRIVER`& to that list.
 As long as the dynamic module would be named &_newdriver.so_&, you can use the
 simple form that most lookups have.
 Edit &_scripts/lookups-Makefile_& if this is a new lookup; there is a for-loop
 near the bottom, ranging the &`name_mod`& variable over a list of all lookups.
 Add your &`NEWDRIVER`& to that list.
 As long as the dynamic module would be named &_newdriver.so_&, you can use the
 simple form that most lookups have.

-.wen

 .next
 Edit &_Makefile_& in the appropriate sub-directory (&_src/routers_&,
 &_src/transports_&, &_src/auths_&, or &_src/lookups_&); add a line for the new
 .next
 Edit &_Makefile_& in the appropriate sub-directory (&_src/routers_&,
 &_src/transports_&, &_src/auths_&, or &_src/lookups_&); add a line for the new