Apply patch to fix bug introduced by the last patch to spool_mbox.c

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

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
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-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.29 2005/03/22 15:02:34 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.110 2006/09/19 14:31:06 ph10 Exp $

 
 New Features in Exim
 --------------------
 
 
 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), 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.
+
+
+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
+------------

 
 

-      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.
+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:

 
 

-      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:
+     ${readsocket{inet:[::1]:1234}{<request data>}...

 
 

-        # 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
+   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.

 
 

-      If Exim never has to generate the parameters itself, the possibility of
-      stalling is removed.
+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.

 
 

-PH/02 A new expansion item for dynamically loading and calling a locally-
-      written C function is now provided, if Exim is compiled with
+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.

 
 

-        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.)
+Version 4.61
+------------

 
 

-      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.
+The documentation is up-to-date for the 4.61 release. Major new features since
+the 4.60 release are:

 
 

-      You load and call an external function like this:
+. An option called disable_ipv6, to disable the use of IPv6 completely.

 
 

-        ${dlfunc{/some/file}{function}{arg1}{arg2}...}
+. An increase in the number of ACL variables to 20 of each type.

 
 

-      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).
+. 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.

 
 

-      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:
+. The default for rfc1413_query_timeout has been changed from 30s to 5s.

 
 

-        int dlfunction(uschar **yield, int argc, uschar *argv[])
+. It is possible to use setclassresources() on some BSD OS to control the
+  resources used in pipe deliveries.

 
 

-      Where "uschar" is a typedef for "unsigned char" in local_scan.h. The
-      function should return one of the following values:
+. A new ACL modifier called add_header, which can be used with any verb.

 
 

-      OK            Success. The string that is placed in "yield" is put into
-                    the expanded string that is being built.
+. More errors are detectable in retry rules.

 
 

-      FAIL          A non-forced expansion failure occurs, with the error
-                    message taken from "yield", if it is set.
+There are a number of other additions too.

 
 

-      FAIL_FORCED   A forced expansion failure occurs, with the error message
-                    taken from "yield" if it is set.

 
 

-      ERROR         Same as FAIL, except that a panic log entry is written.
+Version 4.60
+------------

 
 

-      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.
+The documentation is up-to-date for the 4.60 release. Major new features since
+the 4.50 release are:

 
 

+. Support for SQLite.

 
 

-Version 4.50
-------------
+. 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.

 
 

-The documentation is up-to-date for the 4.50 release.
+There are many more minor changes.

 
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