The "spam" ACL condition code contained a sscanf() call with a %s

[users/heiko/exim.git] / doc / doc-txt / NewStuff

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index 53bfcc17910a1f27129dae0ffab8a4161c2e8bbe..fa86b1e07894b17fbc8d5b6aca941e9e54f1e535 100644 (file)
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.121 2006/11/13 11:26:37 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.146 2007/04/17 13:06:10 ph10 Exp $

 
 New Features in Exim
 --------------------
 
 New Features in Exim
 --------------------


@@ -8,6 +8,91 @@ Before a formal release, there may be quite a lot of detail so that people can
 test from the snapshots or the CVS before the documentation is updated. Once
 the documentation is updated, this file is reduced to a short list.
 
 test from the snapshots or the CVS before the documentation is updated. Once
 the documentation is updated, this file is reduced to a short list.
 

+Version 4.67
+------------
+
+ 1. There is a new log selector called smtp_no_mail, which is not included in
+    the default setting. When it is set, a line is written to the main log
+    whenever an accepted SMTP connection terminates without having issued a
+    MAIL command.
+
+ 2. When an item in a dnslists list is followed by = and & and a list of IP
+    addresses, the behaviour was not clear when the lookup returned more than
+    one IP address. This has been solved by the addition of == and =& for "all"
+    rather than the defaule "any" matching.
+
+ 3. Up till now, the only control over which cipher suites GnuTLS uses has been
+    for the cipher algorithms. New options have been added to allow some of the
+    other parameters to be varied.
+
+ 4. There is a new compile-time option called ENABLE_DISABLE_FSYNC. When it is
+    set, Exim compiles a runtime option called disable_fsync.
+
+ 5. There is a new variable called $smtp_count_at_connection_start.
+
+ 6. There's a new control called no_pipelining.
+
+ 7. There are two new variables called $sending_ip_address and $sending_port.
+    These are set whenever an SMTP connection to another host has been set up.
+
+ 8. The expansion of the helo_data option in the smtp transport now happens
+    after the connection to the server has been made.
+
+ 9. There is a new expansion operator ${rfc2047d: that decodes strings that
+    are encoded as per RFC 2047.
+
+10. There is a new log selector called "pid", which causes the current process
+    id to be added to every log line, in square brackets, immediately after the
+    time and date.
+
+11. Exim has been modified so that it flushes SMTP output before implementing
+    a delay in an ACL. It also flushes the output before performing a callout,
+    as this can take a substantial time. These behaviours can be disabled by
+    obeying control = no_delay_flush or control = no_callout_flush,
+    respectively, at some earlier stage of the connection.
+
+12. There are two new expansion conditions that iterate over a list. They are
+    called forany and forall.
+
+13. There's a new global option called dsn_from that can be used to vary the
+    contents of From: lines in bounces and other automatically generated
+    messages ("delivery status notifications" - hence the name of the option).
+
+14. The smtp transport has a new option called hosts_avoid_pipelining.
+
+15. By default, exigrep does case-insensitive matches. There is now a -I option
+    that makes it case-sensitive.
+
+16. A number of new features ("addresses", "map", "filter", and "reduce") have
+    been added to string expansions to make it easier to process lists of
+    items, typically addresses.
+
+17. There's a new ACL modifier called "continue". It does nothing of itself,
+    and processing of the ACL always continues with the next condition or
+    modifier. It is provided so that the side effects of expanding its argument
+    can be used.
+
+18. It is now possible to use newline and other control characters (those with
+    values less than 32, plus DEL) as separators in lists.
+
+19. The exigrep utility now has a -v option, which inverts the matching
+    condition.
+
+20. The host_find_failed option in the manualroute router can now be set to
+    "ignore".
+
+
+Version 4.66
+------------
+
+No new features were added to 4.66.
+
+
+Version 4.65
+------------
+
+No new features were added to 4.65.
+

 
 Version 4.64
 ------------
 
 Version 4.64
 ------------


@@ -15,182 +100,49 @@ Version 4.64
  1. ACL variables can now be given arbitrary names, as long as they start with
     "acl_c" or "acl_m" (for connection variables and message variables), are at
     least six characters long, with the sixth character being either a digit or
  1. ACL variables can now be given arbitrary names, as long as they start with
     "acl_c" or "acl_m" (for connection variables and message variables), are at
     least six characters long, with the sixth character being either a digit or

-    an underscore. The rest of the name can contain alphanumeric characters and
-    underscores. This is a compatible change because the old set of variables
-    such as acl_m12 are a subset of the allowed names. There may now be any
-    number of ACL variables. For example:
-
-      set acl_c13   = value for original ACL variable
-      set acl_c13b  = whatever
-      set acl_m_foo = something
-
-    What happens if a syntactically valid but undefined ACL variable is
-    referenced depends on the setting of the strict_acl_vars option. If it is
-    false (the default), an empty string is substituted; if it is true, an
-    error is generated. This affects all ACL variables, including the "old"
-    ones such as acl_c4. (Previously there wasn't the concept of an undefined
-    ACL variable.)
-
-    The implementation has been done in such a way that spool files containing
-    ACL variable settings written by previous releases of Exim are compatible
-    and can be read by the new release. If only the original numeric names are
-    used, spool files written by the new release can be read by earlier
-    releases.
+    an underscore.

 
  2. There is a new ACL modifier called log_reject_target. It makes it possible
 
  2. There is a new ACL modifier called log_reject_target. It makes it possible

-    to specify which logs are used for messages about ACL rejections. Its
-    argument is a list of words which can be "main", "reject", or "panic". The
-    default is "main:reject". The list may be empty, in which case a rejection
-    is not logged at all. For example, this ACL fragment writes no logging
-    information when access is denied:
-
-      deny <some conditions>
-           log_reject_target =
-
-    The modifier can be used in SMTP and non-SMTP ACLs. It applies to both
-    permanent and temporary rejections.
+    to specify which logs are used for messages about ACL rejections.

 
  3. There is a new authenticator called "dovecot". This is an interface to the
     authentication facility of the Dovecot POP/IMAP server, which can support a
 
  3. There is a new authenticator called "dovecot". This is an interface to the
     authentication facility of the Dovecot POP/IMAP server, which can support a

-    number of authentication methods. If you are using Dovecot to authenticate
-    POP/IMAP clients, it might be helpful to use the same mechanisms for SMTP
-    authentication. This is a server authenticator only. The only option is
-    server_socket, which must specify the socket which is the interface to
-    Dovecot authentication. The public_name option must specify an
-    authentication mechanism that Dovecot is configured to support. You can
-    have several authenticators for different mechanisms. For example:
-
-      dovecot_plain:
-        driver = dovecot
-        public_name = PLAIN
-        server_name = /var/run/dovecot/auth-client
-        server_setid = $auth1
-
-      dovecot_ntlm:
-        driver = dovecot
-        public_name = NTLM
-        server_name = /var/run/dovecot/auth-client
-        server_setid = $auth1
-
-    If the SMTP connection is encrypted, or if $sender_host_address is equal to
-    $interface_address (that is, the connection is local), the "secured" option
-    is passed in the Dovecot authentication command. If, for a TLS connection,
-    a client certificate has been verified, the "valid-client-cert" option is
-    passed.
+    number of authentication methods.

 
  4. The variable $message_headers_raw provides a concatenation of all the
     messages's headers without any decoding. This is in contrast to
     $message_headers, which does RFC2047 decoding on the header contents.
 
 
  4. The variable $message_headers_raw provides a concatenation of all the
     messages's headers without any decoding. This is in contrast to
     $message_headers, which does RFC2047 decoding on the header contents.
 

- 5. In a DNS black list, when the facility for restricting the matching IP
-    values is used, the text from the TXT record that is set in $dnslist_text
-    may not reflect the true reason for rejection. This happens when lists are
-    merged and the IP address in the A record is used to distinguish them;
-    unfortunately there is only one TXT record. One way round this is not to
-    use merged lists, but that can be inefficient because it requires multiple
-    DNS lookups where one would do in the vast majority of cases when the host
-    of interest is not on any of the lists.
-
-    A less inefficient way of solving this problem has now been implemented. If
-    two domain names, comma-separated, are given, the second is used first to
-    do an initial check, making use of any IP value restrictions that are set.
-    If there is a match, the first domain is used, without any IP value
-    restrictions, to get the TXT record. As a byproduct of this, there is also
-    a check that the IP being tested is indeed on the first list. The first
-    domain is the one that is put in $dnslist_domain. For example:
-
-      reject message  = rejected because $sender_ip_address is blacklisted \
-                        at $dnslist_domain\n$dnslist_text
-             dnslists = sbl.spamhaus.org,sbl-xbl.spamhaus.org=127.0.0.2 : \
-                        dul.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.10
-
-    For the first blacklist item, this starts by doing a lookup in
-    sbl-xbl.spamhaus.org and testing for a 127.0.0.2 return. If there is a
-    match, it then looks in sbl.spamhaus.org, without checking the return
-    value, and as long as something is found, it looks for the corresponding
-    TXT record. If there is no match in sbl-xbl.spamhaus.org, nothing more is
-    done. The second blacklist item is processed similarly.
-
-    If you are interested in more than one merged list, the same list must be
-    given several times, but because the results of the DNS lookups are cached,
-    the DNS calls themselves are not repeated. For example:
-
-      reject dnslists = http.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.2 : \
-                       socks.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.3 : \
-                        misc.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.4 : \
-                         dul.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.10
-
-    In this case there is a lookup in dnsbl.sorbs.net, and if none of the IP
-    values matches (or if no record is found), this is the only lookup that is
-    done. Only if there is a match is one of the more specific lists consulted.
-
- 6. All authenticators now have a server_condition option. Previously, only
-    plaintext had this, and this has not changed: it must be set to the
-    authenticator as a server. For the others, if server_condition is set, it
-    is expanded if authentication is successful, and treated exactly as it is
-    in plaintext. This can serve as a means of adding authorization to an
-    authenticator.
+ 5. In a DNS black list, if two domain names, comma-separated, are given, the
+    second is used first to do an initial check, making use of any IP value
+    restrictions that are set. If there is a match, the first domain is used,
+    without any IP value restrictions, to get the TXT record.
+
+ 6. All authenticators now have a server_condition option.

 
  7. There is a new command-line option called -Mset. It is useful only in
     conjunction with -be (that is, when testing string expansions). It must be
     followed by a message id; Exim loads the given message from its spool
 
  7. There is a new command-line option called -Mset. It is useful only in
     conjunction with -be (that is, when testing string expansions). It must be
     followed by a message id; Exim loads the given message from its spool

-    before doing the expansions, thus setting message-specific variables such
-    as $message_size and the header variables. The $recipients variable is
-    available. This feature is provided to make it easier to test expansions
-    that make use of these variables. However, Exim must be called by an admin
-    user when -Mset is used.
+    before doing the expansions.

 
  8. Another similar new command-line option is called -bem. It operates like
 
  8. Another similar new command-line option is called -bem. It operates like

-    -be except that it must be followed by the name of a file. For example:
-
-      exim -bem /tmp/testmessage
-
-    The file is read as a message (as if receiving a locally-submitted non-SMTP
-    message) before any of the test expansions are done. Thus, message-specific
-    variables such as $message_size and $h_from: are available. However, no
-    Received: header is added to the message. If the -t option is set,
-    recipients are read from the headers in the normal way, and are shown in
-    the $recipients variable. Note that recipients cannot be given on the
-    command line, because further arguments are taken as strings to expand
-    (just like -be).
+    -be except that it must be followed by the name of a file that contains a
+    message.

 
  9. When an address is delayed because of a 4xx response to a RCPT command, it
     is now the combination of sender and recipient that is delayed in
 
  9. When an address is delayed because of a 4xx response to a RCPT command, it
     is now the combination of sender and recipient that is delayed in

-    subsequent queue runs until its retry time is reached. You can revert to
-    the previous behavious, that is, delay the recipient independent of the
-    sender, by setting address_retry_include_sender=false in the smtp
-    transport. However, this can lead to problems with servers that regularly
-    issue 4xx responses to RCPT commands.
+    subsequent queue runs until its retry time is reached.

 
 10. Unary negation and the bitwise logical operators and, or, xor, not, and
 
 10. Unary negation and the bitwise logical operators and, or, xor, not, and

-    shift, have been added to the eval: and eval10: expansion items. These
-    items may now contain arithmetic operators (plus, minus, times, divide,
-    remainder, negate), bitwise operators (and, or, xor, not, shift), and
-    parentheses. All operations are carried out using signed integer
-    arithmetic. Operator priorities are as in C, namely:
-
-      (highest) not, negate
-                times, divide, remainder
-                plus, minus
-                shift-left, shift-right
-                and
-                xor
-      (lowest)  or
-
-    Binary operators with the same priority are evaluated from left to right.
-    For example:
-
-      ${eval:1+1}            yields 2
-      ${eval:1+2*3}          yields 7
-      ${eval:(1+2)*3}        yields 9
-      ${eval:2+42%5}         yields 4
-      ${eval:0xc&5}          yields 4
-      ${eval:0xc|5}          yields 13
-      ${eval:0xc^5}          yields 9
-      ${eval:0xc>>1}         yields 6
-      ${eval:0xc<<1}         yields 24
-      ${eval:~255&0x1234}    yields 4608
-      ${eval:-(~255&0x1234)} yields -4608
+    shift, have been added to the eval: and eval10: expansion items.
+
+11. The variables $interface_address and $interface_port have been renamed
+    as $received_ip_address and $received_port, to make it clear that they
+    relate to message reception rather than delivery. (The old names remain
+    available for compatibility.)
+
+12. The "message" modifier can now be used on "accept" and "discard" acl verbs
+    to vary the message that is sent when an SMTP command is accepted.

 
 
 Version 4.63
 
 
 Version 4.63