-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.30 2005/03/22 16:52:06 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.109 2006/09/19 11:28:44 ph10 Exp $
New Features in Exim
--------------------
-This file contains descriptions of new features that have been added to Exim,
-but have not yet made it into the main manual (which is most conveniently
-updated when there is a relatively large batch of changes). The doc/ChangeLog
-file contains a listing of all changes, including bug fixes.
+This file contains descriptions of new features that have been added to Exim.
+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.
-Version 4.51
+Version 4.64
------------
-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.
+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) and are
+ at least 6 characters long. However, only alphanumeric characters and
+ underscores are allowed. 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:
- 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.
+ set acl_c_foo = something
+ set acl_ccc = thingsome
+ set acl_m13 = value for original ACL variable
+ set acl_m13b = whatever
- 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:
+ What happens if an 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.)
- # 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
+ 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.
- 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
+Version 4.63
+------------
+
+1. There is a new Boolean option called filter_prepend_home for the redirect
+ router.
+
+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.
+
+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.
+
+4. There is a new parameter for LDAP lookups called "referrals", which takes
+ one of the settings "follow" (the default) or "nofollow".
+
+5. Version 20070721.2 of exipick now included, offering these new options:
+ --reverse
+ After all other sorting options have bee processed, reverse order
+ before displaying messages (-R is synonym).
+ --random
+ Randomize order of matching messages before displaying.
+ --size
+ Instead of displaying the matching messages, display the sum
+ of their sizes.
+ --sort <variable>[,<variable>...]
+ Before displaying matching messages, sort the messages according to
+ each messages value for each variable.
+ --not
+ Negate the value for every test (returns inverse output from the
+ same criteria without --not).
+
+
+Version 4.62
+------------
- EXPAND_DLFUNC=yes
+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:
- 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.)
+ ${readsocket{inet:[::1]:1234}{<request data>}...
- 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.
+ 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.
- You load and call an external function like this:
+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.
- ${dlfunc{/some/file}{function}{arg1}{arg2}...}
+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.
- 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:
+Version 4.61
+------------
- int dlfunction(uschar **yield, int argc, uschar *argv[])
+The documentation is up-to-date for the 4.61 release. Major new features since
+the 4.60 release are:
- Where "uschar" is a typedef for "unsigned char" in local_scan.h. The
- function should return one of the following values:
+. An option called disable_ipv6, to disable the use of IPv6 completely.
- OK Success. The string that is placed in "yield" is put into
- the expanded string that is being built.
+. An increase in the number of ACL variables to 20 of each type.
- FAIL A non-forced expansion failure occurs, with the error
- message taken from "yield", if it is set.
+. 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.
- FAIL_FORCED A forced expansion failure occurs, with the error message
- taken from "yield" if it is set.
+. The default for rfc1413_query_timeout has been changed from 30s to 5s.
- ERROR Same as FAIL, except that a panic log entry is written.
+. It is possible to use setclassresources() on some BSD OS to control the
+ resources used in pipe deliveries.
- 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.
+. A new ACL modifier called add_header, which can be used with any verb.
-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.
+. More errors are detectable in retry rules.
-Version 4.50
+There are a number of other additions too.
+
+
+Version 4.60
------------
-The documentation is up-to-date for the 4.50 release.
+The documentation is up-to-date for the 4.60 release. Major new features since
+the 4.50 release are:
+
+. Support for SQLite.
+
+. Support for IGNOREQUOTA in LMTP.
+
+. Extensions to the "submission mode" features.
+
+. Support for Client SMTP Authorization (CSA).
+
+. Support for ratelimiting hosts and users.
+
+. New expansion items to help with the BATV "prvs" scheme.
+
+. A "match_ip" condition, that matches an IP address against a list.
+
+There are many more minor changes.
****
git://git.exim.org / users / jgh / exim.git / blobdiff