X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/c46782effbf7f5ecde21a8d29cb22b42fda0fe8e..db9452a9b5941d43e6ef3988cd0d30d2758844cf:/doc/doc-misc/WishList diff --git a/doc/doc-misc/WishList b/doc/doc-misc/WishList index 23a597d8a..7fadb1ee3 100644 --- a/doc/doc-misc/WishList +++ b/doc/doc-misc/WishList @@ -1,4 +1,4 @@ -$Cambridge: exim/doc/doc-misc/WishList,v 1.62 2006/03/02 12:25:48 ph10 Exp $ +$Cambridge: exim/doc/doc-misc/WishList,v 1.69 2006/06/30 08:53:49 ph10 Exp $ EXIM 4 WISH LIST ---------------- @@ -295,16 +295,6 @@ David Carter 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 @@ -1255,11 +1245,6 @@ 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. - -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 @@ -1297,7 +1282,6 @@ permanent ones after some fixed time. ------------------------------------------------------------------------------ (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 @@ -1330,13 +1314,6 @@ e.g. exigrep, eximstats, will be automatically handled if the logs are 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 @@ -1442,12 +1419,6 @@ 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 ------------------------------------------------------------------------------ -(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 @@ -1608,12 +1579,6 @@ For example: mainlog_selector and rejectlog_selector, with log_selector setting 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 @@ -1905,7 +1870,7 @@ 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. -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 @@ -1969,6 +1934,34 @@ should also defer, for compatibility with ACLs. 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 @@ -1997,9 +1990,66 @@ code, because of caching. Probably means we have to invent ewildlsearch and 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: 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. ------------------------------------------------------------------------------ ---- HWM 350 ------------------------------------------------------------------ +--- HWM 355 ------------------------------------------------------------------ ---------------------------- End of WishList ---------------------------------