Prevent hardlink attack on mbox sticky mail directory. fixes: bug #988

[users/jgh/exim.git] / doc / doc-misc / WishList

diff --git a/doc/doc-misc/WishList b/doc/doc-misc/WishList
index 572a8d5c11881a9145b96eeab91f4f4ac1f5bd29..a3a9431d36957d1a20600f13a878d399b753c26b 100644 (file)
--- a/doc/doc-misc/WishList
+++ b/doc/doc-misc/WishList
@@ -1,8 +1,14 @@
-$Cambridge: exim/doc/doc-misc/WishList,v 1.63 2006/03/02 15:13:59 ph10 Exp $
+$Cambridge: exim/doc/doc-misc/WishList,v 1.70 2007/02/27 11:51:27 ph10 Exp $

 
 EXIM 4 WISH LIST
 ----------------
 
 
 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+no longer maintained.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...
 
 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...
 


@@ -295,16 +301,6 @@ David Carter
 So several warnings could be generated as the mailbox got bigger and bigger.
 ------------------------------------------------------------------------------
 
 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
 
 (148) 15-May-2000 S  Warn recipient if message rejected for quota excession.
 Heinz Ekker
 


@@ -1255,11 +1251,6 @@ This is an option that turns all hard bounces into soft bounces. The idea is
 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.
 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
 ------------------------------------------------------------------------------
 
 (202) 10-Oct-03 S  -bvsomething to do a callout after the verify


@@ -1297,7 +1288,6 @@ permanent ones after some fixed time.
 ------------------------------------------------------------------------------
 
 (209) 31-Oct-03 S  a way of making crashes in pipe commands temporary errors
 ------------------------------------------------------------------------------
 
 (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
 ------------------------------------------------------------------------------
 
 (210) 31-Oct-03 S  runtime option to change the daemon name used for tcprwappers


@@ -1330,13 +1320,6 @@ e.g. exigrep, eximstats, will be automatically handled if the logs are
 changed.)
 ------------------------------------------------------------------------------
 
 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
 (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


@@ -1442,12 +1425,6 @@ this reason, I don't really like this idea.
 (236) 02-Feb-04 S  String in local_scan that's added to the binary version string
 ------------------------------------------------------------------------------
 
 (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
 (238) 05-Feb-04 S  ${address to handle multiple addresses
 
 At present, ${address expects to see just one address. An extension would let


@@ -1608,12 +1585,6 @@ For example: mainlog_selector and rejectlog_selector, with log_selector setting
 both of them.
 ------------------------------------------------------------------------------
 
 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
 (288) 10-Aug-04 M Option for verify to require MX
 
 e.g. verify=sender/require_mx


@@ -1905,7 +1876,7 @@ headers should be re-planned and re-implemented in a more consistent manner.
 These are the main previous items:
 
 Exim 3 Wish List: 41, 85, 149, 187.
 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
 ------------------------------------------------------------------------------
 
 (334) 07-Jun-05 M Support for messages larger than 2G


@@ -2025,9 +1996,66 @@ code, because of caching. Probably means we have to invent ewildlsearch and
 enwildlsearch.
 ------------------------------------------------------------------------------
 
 enwildlsearch.
 ------------------------------------------------------------------------------
 

-(350) 28-Feb-06 S Additional errors for retry rules
+(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.
+------------------------------------------------------------------------------
+
+(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

 
 

-(i) Unexpected connection close; (ii) mail_4xx.
+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 smpt command could be used for other purposes, like
+to dectect and react to some kiddies that send things like
+http://... on the smtp port.

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 ------------------------------------------------------------------------------

---- HWM 350 ------------------------------------------------------------------
+--- HWM 355 ------------------------------------------------------------------

 ---------------------------- End of WishList ---------------------------------
 ---------------------------- End of WishList ---------------------------------