-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.37 2005/04/27 13:29:32 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.105 2006/07/13 13:53:32 ph10 Exp $
New Features in Exim
--------------------
updated when there is a relatively large batch of changes). The doc/ChangeLog
file contains a listing of all changes, including bug fixes.
-
-Version 4.51
+Version 4.63
------------
-PH/01 The format in which GnuTLS parameters are written to the gnutls-param
- file in the spool directory has been changed. This change has been made
- to alleviate problems that some people had with the generation of the
- parameters by Exim when /dev/random was exhausted. In this situation,
- Exim would hang until /dev/random acquired some more entropy.
-
- The new code exports and imports the DH and RSA parameters in PEM
- format. This means that the parameters can be generated externally using
- the certtool command that is part of GnuTLS.
-
- To replace the parameters with new ones, instead of deleting the file
- and letting Exim re-create it, you can generate new parameters using
- certtool and, when this has been done, replace Exim's cache file by
- renaming. The relevant commands are something like this:
-
- # rm -f new.params
- # touch new.params
- # chown exim:exim new.params
- # chmod 0400 new.params
- # certtool --generate-privkey --bits 512 >new.params
- # echo "" >>new.params
- # certtool --generate-dh-params --bits 1024 >> new.params
- # mv new.params params
-
- If Exim never has to generate the parameters itself, the possibility of
- stalling is removed.
-
-PH/02 A new expansion item for dynamically loading and calling a locally-
- written C function is now provided, if Exim is compiled with
-
- EXPAND_DLFUNC=yes
-
- set in Local/Makefile. The facility is not included by default (a
- suitable error is given if you try to use it when it is not there.)
-
- If you enable EXPAND_DLFUNC, you should also be aware of the new redirect
- router option forbid_filter_dlfunc. If you have unprivileged users on
- your system who are permitted to create filter files, you might want to
- set forbid_filter_dlfunc=true in the appropriate router, to stop them
- using ${dlfunc to run code within Exim.
+1. There is a new Boolean option called filter_prepend_home for the redirect
+ router. It defaults true, for backward compatibility. If a "save" command in
+ an Exim filter has a relative path for its argument, and $home is defined,
+ it is automatically prepended to the relative path. This action can now be
+ prevented by setting filter_prepend_home false.
+
+2. There is a new acl, set by acl_not_smtp_start, which is run right at the
+ start of receiving a non-SMTP message, before any of the message has been
+ read. (This is the analogue of the acl_smtp_predata ACL for SMTP input.) The
+ result of this ACL is ignored; it cannot be used to reject a message. If
+ you really need to, you could set a value in an ACL variable here and reject
+ based on that in the acl_not_smtp ACL. However, this ACL can be used to set
+ controls, and in particular, it can be used to set control=suppress_local_
+ fixups, which cannot be used in the acl_not_smtp ACL because by the time
+ that ACL is run, it is too late. When the acl_not_smtp_start ACL is run, the
+ sender and recipients are known, so the "senders" and "sender_domains"
+ conditions and $sender_address and $recipients variables can be used.
+ Variables such as $authenticated_ sender are also available. It is possible
+ to specify added header lines in this ACL.
+
+3. When an SMTP error message is specified in a "message" modifier in an ACL,
+ or in a :fail: or :defer: message in a redirect router, Exim now checks the
+ start of the message for an SMTP error code. This consists of three digits
+ followed by a space, optionally followed by an extended code of the form
+ n.n.n, also followed by a space. If this is the case and the very first
+ digit is the same as the default error code, the code from the message is
+ used instead. If the very first digit is incorrect, a panic error is logged,
+ and the default code is used. This is an incompatible change, but it is not
+ expected to affect many (if any) configurations. It is possible to suppress
+ the use of the supplied code in a redirect router by setting the
+ smtp_error_code option false. In this case, any SMTP code is quietly
+ ignored.
+
+
+Version 4.62
+------------
- You load and call an external function like this:
-
- ${dlfunc{/some/file}{function}{arg1}{arg2}...}
-
- Once loaded, Exim remembers the dynamically loaded object so that it
- doesn't reload the same object file in the same Exim process (but of
- course Exim does start new processes frequently).
-
- There may be from zero to eight arguments to the function. When compiling
- a local function that is to be called in this way, local_scan.h should be
- included. The Exim variables and functions that are defined by that API
- are also available for dynamically loaded functions. The function itself
- must have the following type:
-
- int dlfunction(uschar **yield, int argc, uschar *argv[])
+1. The ${readsocket expansion item now supports Internet domain sockets as well
+ as Unix domain sockets. If the first argument begins "inet:", it must be of
+ the form "inet:host:port". The port is mandatory; it may be a number or the
+ name of a TCP port in /etc/services. The host may be a name, or it may be an
+ IP address. An ip address may optionally be enclosed in square brackets.
+ This is best for IPv6 addresses. For example:
- Where "uschar" is a typedef for "unsigned char" in local_scan.h. The
- function should return one of the following values:
+ ${readsocket{inet:[::1]:1234}{<request data>}...
- OK Success. The string that is placed in "yield" is put into
- the expanded string that is being built.
+ Only a single host name may be given, but if looking it up yield more than
+ one IP address, they are each tried in turn until a connection is made. Once
+ a connection has been made, the behaviour is as for ${readsocket with a Unix
+ domain socket.
- FAIL A non-forced expansion failure occurs, with the error
- message taken from "yield", if it is set.
+2. If a redirect router sets up file or pipe deliveries for more than one
+ incoming address, and the relevant transport has batch_max set greater than
+ one, a batch delivery now occurs.
- FAIL_FORCED A forced expansion failure occurs, with the error message
- taken from "yield" if it is set.
+3. The appendfile transport has a new option called maildirfolder_create_regex.
+ Its value is a regular expression. For a maildir delivery, this is matched
+ against the maildir directory; if it matches, Exim ensures that a
+ maildirfolder file is created alongside the new, cur, and tmp directories.
- ERROR Same as FAIL, except that a panic log entry is written.
- When compiling a function that is to be used in this way with gcc,
- you need to add -shared to the gcc command. Also, in the Exim build-time
- configuration, you must add -export-dynamic to EXTRALIBS.
+Version 4.61
+------------
-TF/01 $received_time is a new expansion variable containing the time and date
- as a number of seconds since the start of the Unix epoch when the
- current message was received.
+The documentation is up-to-date for the 4.61 release. Major new features since
+the 4.60 release are:
-PH/03 There is a new value for RADIUS_LIB_TYPE that can be set in
- Local/Makefile. It is RADIUSCLIENTNEW, and it requests that the new API,
- in use from radiusclient 0.4.0 onwards, be used. It does not appear to be
- possible to detect the different versions automatically.
+. An option called disable_ipv6, to disable the use of IPv6 completely.
-PH/04 There is a new option called acl_not_smtp_mime that allows you to scan
- MIME parts in non-SMTP messages. It operates in exactly the same way as
- acl_smtp_mime
+. An increase in the number of ACL variables to 20 of each type.
-PH/05 It is now possible to redefine a macro within the configuration file.
- The macro must have been previously defined within the configuration (or
- an included file). A definition on the command line using the -D option
- causes all definitions and redefinitions within the file to be ignored.
- In other words, -D overrides any values that are set in the file.
- Redefinition is specified by using '==' instead of '='. For example:
+. A change to use $auth1, $auth2, and $auth3 in authenticators instead of $1,
+ $2, $3, (though those are still set) because the numeric variables get used
+ for other things in complicated expansions.
- MAC1 = initial value
- ...
- MAC1 == updated value
+. The default for rfc1413_query_timeout has been changed from 30s to 5s.
- Redefinition does not alter the order in which the macros are applied to
- the subsequent lines of the configuration file. It is still the same
- order in which the macros were originally defined. All that changes is
- the macro's value. Redefinition makes it possible to accumulate values.
- For example:
+. It is possible to use setclassresources() on some BSD OS to control the
+ resources used in pipe deliveries.
- MAC1 = initial value
- ...
- MAC1 == MAC1 and something added
+. A new ACL modifier called add_header, which can be used with any verb.
- This can be helpful in situations where the configuration file is built
- from a number of other files.
+. More errors are detectable in retry rules.
-PH/06 Macros may now be defined or redefined between router, transport,
- authenticator, or ACL definitions, as well as in the main part of the
- configuration. They may not, however, be changed within an individual
- driver or ACL, or in the local_scan, retry, or rewrite sections of the
- configuration.
+There are a number of other additions too.
-PH/07 $acl_verify_message is now set immediately after the failure of a
- verification in an ACL, and so is available in subsequent modifiers. In
- particular, the message can be preserved by coding like this:
- warn !verify = sender
- set acl_m0 = $acl_verify_message
+Version 4.60
+------------
- Previously, $acl_verify_message was set only while expanding "message"
- and "log_message" when a very denied access.
+The documentation is up-to-date for the 4.60 release. Major new features since
+the 4.50 release are:
-PH/08 The redirect router has two new options, sieve_useraddress and
- sieve_subaddress. These are passed to a Sieve filter to specify the :user
- and :subaddress parts of an address. Both options are unset by default.
- However, when a Sieve filter is run, if sieve_useraddress is unset, the
- entire original local part (including any prefix or suffix) is used for
- :user. An unset subaddress is treated as an empty subaddress.
+. Support for SQLite.
-PH/09 Quota values can be followed by G as well as K and M.
+. Support for IGNOREQUOTA in LMTP.
-PH/10 $message_linecount is a new variable that contains the total number of
- lines in the header and body of the message. Compare $body_linecount,
- which is the count for the body only. During the DATA and
- content-scanning ACLs, $message_linecount contains the number of lines
- received. Before delivery happens (that is, before filters, routers, and
- transports run) the count is increased to include the Received: header
- line that Exim standardly adds, and also any other header lines that are
- added by ACLs. The blank line that separates the message header from the
- body is not counted. Here is an example of the use of this variable in a
- DATA ACL:
+. Extensions to the "submission mode" features.
- deny message = Too many lines in message header
- condition = \
- ${if <{250}{${eval: $message_linecount - $body_linecount}}}
+. Support for Client SMTP Authorization (CSA).
- In the MAIL and RCPT ACLs, the value is zero because at that stage the
- message has not yet been received.
+. Support for ratelimiting hosts and users.
+. New expansion items to help with the BATV "prvs" scheme.
-Version 4.50
-------------
+. A "match_ip" condition, that matches an IP address against a list.
-The documentation is up-to-date for the 4.50 release.
+There are many more minor changes.
****
git://git.exim.org / users / heiko / exim.git / blobdiff