Alain Williams' patch for disabling LDAP referrals when requested.

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

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index 16f494bb98c94d84e6060227931ff8cae24178c9..35d3bde3069d57fcaf59cf366b1adebbf9934880 100644 (file)
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.35 2005/04/06 14:40:23 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.106 2006/07/17 09:18:09 ph10 Exp $

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


@@ -8,149 +8,120 @@ 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.
 
 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.
+
+4. There is a new parameter for LDAP lookups called "referrals", which takes
+   one of the settings "follow" (the default) or "nofollow". The latter stops
+   the LDAP library from trying to follow referrals issued by the LDAP server.
+
+
+Version 4.62
+------------

 
 

-      You load and call an external function like this:
+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:

 
 

-        ${dlfunc{/some/file}{function}{arg1}{arg2}...}
+     ${readsocket{inet:[::1]:1234}{<request data>}...

 
 

-      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).
+   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.

 
 

-      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:
+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.

 
 

-        int dlfunction(uschar **yield, int argc, uschar *argv[])
+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.

 
 

-      Where "uschar" is a typedef for "unsigned char" in local_scan.h. The
-      function should return one of the following values:

 
 

-      OK            Success. The string that is placed in "yield" is put into
-                    the expanded string that is being built.
+Version 4.61
+------------

 
 

-      FAIL          A non-forced expansion failure occurs, with the error
-                    message taken from "yield", if it is set.
+The documentation is up-to-date for the 4.61 release. Major new features since
+the 4.60 release are:

 
 

-      FAIL_FORCED   A forced expansion failure occurs, with the error message
-                    taken from "yield" if it is set.
+. An option called disable_ipv6, to disable the use of IPv6 completely.

 
 

-      ERROR         Same as FAIL, except that a panic log entry is written.
+. An increase in the number of ACL variables to 20 of each type.

 
 

-      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 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.

 
 

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

 
 

-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.
+. It is possible to use setclassresources() on some BSD OS to control the
+  resources used in pipe deliveries.

 
 

-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
+. A new ACL modifier called add_header, which can be used with any verb.

 
 

-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:
+. More errors are detectable in retry rules.

 
 

-        MAC1 =  initial value
-        ...
-        MAC1 == updated value
+There are a number of other additions too.

 
 

-      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:

 
 

-        MAC1 =  initial value
-        ...
-        MAC1 == MAC1 and something added
+Version 4.60
+------------

 
 

-      This can be helpful in situations where the configuration file is built
-      from a number of other files.
+The documentation is up-to-date for the 4.60 release. Major new features since
+the 4.50 release are:

 
 

-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.
+. Support for SQLite.

 
 

-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:
+. Support for IGNOREQUOTA in LMTP.

 
 

-         warn  !verify = sender
-               set acl_m0 = $acl_verify_message
+. Extensions to the "submission mode" features.

 
 

-      Previously, $acl_verify_message was set only while expanding "message"
-      and "log_message" when a very denied access.
+. Support for Client SMTP Authorization (CSA).

 
 

-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 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.

 
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