-$Cambridge: exim/doc/doc-misc/WishList,v 1.56 2005/11/15 09:27:25 ph10 Exp $
+$Cambridge: exim/doc/doc-misc/WishList,v 1.67 2006/04/04 12:59:42 ph10 Exp $
EXIM 4 WISH LIST
----------------
So several warnings could be generated as the mailbox got bigger and bigger.
------------------------------------------------------------------------------
-(146) 15-May-2000 M Allow SMTP error codes in retry rules
-
-This would allow special handling of certain errors from certain hosts. In
-particular, it would allow failing of certain 4xx codes.
-
-This is now available for 4xx responses to RCPT commands. Is anything more
-needed? Apparently, yes; there's been a request for a similar feature for MAIL
-commands.
-------------------------------------------------------------------------------
-
(148) 15-May-2000 S Warn recipient if message rejected for quota excession.
Heinz Ekker
different kinds of verify failure.
------------------------------------------------------------------------------
-(196) 30-Sep-03 S A way of detecting whether it was HELO or EHLO in the ACL
-
-$received_protocol isn't reset until after the command is accepted (which
-seems right), and $smtp_data shows only the arguments. Maybe $smtp_command?
-------------------------------------------------------------------------------
-
(197) 30-Sep-03 S MACROS_DROP_PRIVS and ALT_CONFIG_DROP_PRIVS
Now that alternative configurations can be restricted to certain directories,
that it can be used as a safety-net while testing configurations. Instead of a
local bounce, the message stays on the queue; instead of 5xx SMTP responses,
4xx ones are given.
-
-The ability to do the opposite - turn 4xx into 5xx under certain circumstances
-might also be useful (e.g. after a certain time). This might best be done by
-extending the retry logic to recognize 4xx as a special error. (This is now
-done.)
------------------------------------------------------------------------------
(202) 10-Oct-03 S -bvsomething to do a callout after the verify
------------------------------------------------------------------------------
(209) 31-Oct-03 S a way of making crashes in pipe commands temporary errors
-
------------------------------------------------------------------------------
(210) 31-Oct-03 S runtime option to change the daemon name used for tcprwappers
Unfortunately, this isn't quite as trivial as it seems.
------------------------------------------------------------------------------
-(215) 14-Nov-03 S A way of turning off message-submission fix-ups
-
-Globally, and perhaps also via an ACL control so that it can be done on a
-per-message basis. Is this still needed? Since this item was added to this
-list, default fixups for non-local messages have been removed, and control =
-submission has been added.
-------------------------------------------------------------------------------
-
(215) 26-Nov-03 M/L Conversion of IDNA domain names for logging
IDNA (RFCs 3490-3492) converts domains names containing non-ASCII characters
changed.)
------------------------------------------------------------------------------
-(216) 27-Nov-03 S Option to bounce if required TLS doesn't happen
-
-This is for the smtp transport with hosts_require_tls set. Currently, it
-defers. Possibly the best approach is to make the error one that can be seen by
-the retry logic.
-------------------------------------------------------------------------------
-
(217) 27-Nov-03 M A function to pass back variables from Perl
This is a function that can be called from Perl, to take a name and a value and
(236) 02-Feb-04 S String in local_scan that's added to the binary version string
------------------------------------------------------------------------------
-(237) 02-Feb-04 M Add_header in ACLs because "message" is overloaded
-
-This would be useful for verbs where "message" is an error message. See also
-333.
-------------------------------------------------------------------------------
-
(238) 05-Feb-04 S ${address to handle multiple addresses
At present, ${address expects to see just one address. An extension would let
both of them.
------------------------------------------------------------------------------
-(286) 21-Jul-04 M Distinguishing a larger number of errors
-
-For instance, detecting "connection reset by peer" (ENETRESET or ECONNRESET)
-might be useful.
-------------------------------------------------------------------------------
-
(288) 10-Aug-04 M Option for verify to require MX
e.g. verify=sender/require_mx
These are the main previous items:
Exim 3 Wish List: 41, 85, 149, 187.
-Exim 4 Wish List: 55, 62, 63, 160, 212, 237, 270, 314, 328.
+Exim 4 Wish List: 55, 62, 63, 160, 212, 270, 314, 328.
------------------------------------------------------------------------------
(334) 07-Jun-05 M Support for messages larger than 2G
(341) 15-Sep-05 S Add /return_path_retain to submission mode
-This would re-instate the behaviour prior to change 4.52/TF/02.
+This would re-instate the behaviour prior to change 4.52/PH/04.
------------------------------------------------------------------------------
(342) 26-Sep-05 T Log and maybe defer odd values for condition pre-condition
The natural syntax for this would be to use a regex, like this:
${lookup regex{/some/file regex}{found-string}{not-found-string}}
+However, it would be natural to want to use $1 etc in the found-string; this
+would be hard because of the lookup caching (if repeated, the lookup won't
+actually be done and therefore the numerical variables won't be set), and in
+any case, even without caching (and it could, I suppose, be disabled for this
+lookup) those variables are not in the right storage pool even if they were
+preserved after the lookup.
+
+An alternative approach might be to implement something like this:
+
+ ${scanfile{/some/file}{sub-expression}}
+
+where the sub-expression is expanded for every line in the file, with each line
+in turn being put into $value. This is like a conditional ${readfile, and in
+fact ${readfile could be written using ${scanfile. It would be nice to find a
+way of stopping the scan once something has happened. The only thing I can
+think of is to invent a variable that changes when scanning a line generates
+some non-null text, and then always to stop on a forced failure. That would
+allow expressions like this:
+
+ ${scanfile{/some/file}
+ {
+ ${if eq{$generated}{}{${if match{regex}{$value}{something}}} fail}
+ }}
+
+It's all rather clumsy. Once a line has matched and generated some text, the
+next iteration would stop the scan. Another thought: maybe use $scanline
+instead of $value (to save confusion) and have $scantext containing everything
+that's been generated so far. That sounds pretty flexible.
------------------------------------------------------------------------------
(344) 10-Oct-05 M Make debug_print work in authenticators
code, because of caching. Probably means we have to invent ewildlsearch and
enwildlsearch.
------------------------------------------------------------------------------
---- HWM 347 ------------------------------------------------------------------
+
+(351) 31-Mar-06 ? Allow some/all/a few internal variables to be set
+
+The original idea was to allow "set authenticated = x" to pretend a connection
+is authenticated after other conditions are true. This can, of course, be
+packaged up using macros in other ways. Setting other variables could cause
+problems.
+------------------------------------------------------------------------------
+
+(352) 04-Apr-06 S Add +accept_defer for host lists (and maybe others)
+
+At present, a defer causes a delivery defer. For non-critical ACLs there are
+times when it may be better to accept. See also 226 and 289.
+------------------------------------------------------------------------------
+--- HWM 352 ------------------------------------------------------------------
---------------------------- End of WishList ---------------------------------
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