-$Cambridge: exim/doc/doc-misc/WishList,v 1.66 2006/03/31 08:37:47 ph10 Exp $
-
EXIM 4 WISH LIST
----------------
+This Wish List is now obsolete. The items it contains have been imported into
+the Exim Bugzilla, which is where all new wishes should be added. This file is
+no longer maintained. Some day it should be deleted.
+
+
+===============================================================================
Even when it was first released, Exim 4 had a Wish List because not all the
things suggested for it were implemented. The list has not stopped growing...
mark david mcCreary
"I use the syntax_errors_to feature to email a copy of the error message.
-It would be helpful to have the X-Failed-Receipients header in there,
-identifying which addreses(s) are the problem, so that I don't have to
+It would be helpful to have the X-Failed-Recipients header in there,
+identifying which address(es) are the problem, so that I don't have to
parse the body of the email message to figure out which addresses."
------------------------------------------------------------------------------
Is this really worth it? A per-transport value is also suggested - that would
mean remembering the value with each failed address and taking a minimum or
-a maximimum (which?).
+a maximum (which?).
------------------------------------------------------------------------------
(24) 21-Feb-02 ? A way of testing TLS using -bh
data transmitted for a non-delivery attempt.
------------------------------------------------------------------------------
-(69) 03-Jul-02 T Log selector to log whoson checs
+(69) 03-Jul-02 T Log selector to log whoson checks
Matt Bernstein
"I'd quite like a log_selector option which could spot you'd done a whoson
Peter A. Savitch
OpenLDAP 2.1 is going to be more popular (2.1.9 is available with many
-bug fixes). TLS-enabled LDAP is an interesting and usefull thing.
+bug fixes). TLS-enabled LDAP is an interesting and useful thing.
I can try to implement some things and send the patches, like with
ldapi.
See also 333.
------------------------------------------------------------------------------
-(214) 05-Nov-03 S Put the wild part of local part prefix/suffx in variables
+(214) 05-Nov-03 S Put the wild part of local part prefix/suffix in variables
Unfortunately, this isn't quite as trivial as it seems.
------------------------------------------------------------------------------
(292) 13-Aug-04 M Overall timeout for message reception
-A client could in priciple keep an SMTP connection open for a very long time by
+A client could in principle keep an SMTP connection open for a very long time by
trickling in data very slowly. Also, after message_size_limit is exceeded, Exim
continues to swallow the data (though it does not write it to disk) until the
end is reached. Again, the connection could be held open for a very long time.
packaged up using macros in other ways. Setting other variables could cause
problems.
------------------------------------------------------------------------------
---- HWM 351 ------------------------------------------------------------------
+
+(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.
+------------------------------------------------------------------------------
+
+(354) 30-Jun-06 ? Extensions to SMTP error codes
+
+A number of ideas arose following a discussion on the mailing list. I record
+them here so that they don't get lost. The motivations were to support the 551
+bounce code and enhanced status codes. Suggestions are to add a new ACL
+feature, possibly one of:
+
+ errorcode = 511
+ control = errorcode=551
+ message = 551 xxxx
+
+where in the last case, it's recognized by being 3 digits. In all cases, the
+first digit must be "right" for the circumstance - ignore or fault if not?
+
+To handle ESC, perhaps a new variable called $smtp_errorcode, settable by an
+option in a router when it fails, would do the trick. It could be used in any
+of the above modifiers.
+------------------------------------------------------------------------------
+
+(355) 30-Jun-06 ? Facility to permit experiments with SMTP extensions
+
+This is what was suggested:
+
+- adding some expansion variables: $ehlo_extensions (which will
+ hold the remote server supported smtp extensions announced
+ in the ehlo) and $rcpt_arguments with any RCPT extra argument
+
+- a main configuration option for adding ehlo extensions to the
+ ehlo response, like:
+
+ extra_ehlo_extensions = XFOO : XBAR
+
+- a extra option for the smtp transport to add arguments to
+ the RCPT TO command, like:
+
+ rcpt_args = FOO=BAR (will make exim issue RCPT TO:<a@b.c> FOO=BAR
+ when delivering that message)
+
+- a new acl for unknown smtp commands
+
+This should be very simple to implement and will allow to make
+some experiments and implement custom extensions, i.e. one to
+known if remote client will redirect on 551 or not. Also the acl
+for unknown smtp command could be used for other purposes, like
+to detect and react to some kiddies that send things like
+http://... on the smtp port.
+------------------------------------------------------------------------------
+--- HWM 355 ------------------------------------------------------------------
---------------------------- End of WishList ---------------------------------
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