X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/2e0c1448cf7e5612a17b4ff09fe7a05235cce7f2..41609df58fdd3fe023b91baece7d18a595f57e56:/doc/doc-txt/NewStuff?ds=sidebyside diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff index bd6f2e8c1..4f7ca8470 100644 --- a/doc/doc-txt/NewStuff +++ b/doc/doc-txt/NewStuff @@ -1,4 +1,4 @@ -$Cambridge: exim/doc/doc-txt/NewStuff,v 1.37 2005/04/27 13:29:32 ph10 Exp $ +$Cambridge: exim/doc/doc-txt/NewStuff,v 1.104 2006/06/28 16:00:23 ph10 Exp $ New Features in Exim -------------------- @@ -8,169 +8,103 @@ 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. - -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. + + +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}{}... - 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. ****