[Pkg-exim4-users] Delayed delivery problems Freemail/Web.de

[Paul Menzel]

Dear Exim experts,


since about a week some messages are delayed  Others seem to have the
same problem [1].

1. Messages sent by myself to a Web.de address over my server with Exim
running, results in several hours delay. Looking at `/var/log/mainlog*`
I am seeing the following.

        2012-04-10 21:16:58 1SHiQX-000803-MZ SMTP error from remote mail server after RCPT TO:<user.name at web.de>: host mx-ha02.web.de [213.165.67.120]: 450 Requested mail action not taken: mailbox unavailable
        2012-04-10 21:17:18 1SHiQX-000803-MZ == user.name at web.de R=dnslookup T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT TO:<user.name at web.de>: host mx-ha03.web.de [213.165.67.104]: 450 Requested mail action not taken: mailbox unavailable

        […]

        2012-04-10 21:38:08 Start queue run: pid=30913
        2012-04-10 21:38:28 1SHiQX-000803-MZ SMTP error from remote mail server after RCPT TO:<user.name at web.de>: host mx-ha02.web.de [213.165.67.120]: 450 Requested mail action not taken: mailbox unavailable
        2012-04-10 21:38:48 1SHiQX-000803-MZ == user.name at web.de R=dnslookup T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT TO:<user.name at web.de>: host mx-ha03.web.de [213.165.67.104]: 450 Requested mail action not taken: mailbox unavailable
        2012-04-10 21:38:48 End queue run: pid=30913

        […]

        2012-04-10 22:08:08 Start queue run: pid=31166
        2012-04-10 22:08:28 1SHiQX-000803-MZ SMTP error from remote mail server after RCPT TO:<user.name at web.de>: host mx-ha03.web.de [213.165.67.104]: 450 Requested mail action not taken: mailbox unavailable
        2012-04-10 22:08:48 1SHiQX-000803-MZ == user.name at web.de R=dnslookup T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT TO:<user.name at web.de>: host mx-ha02.web.de [213.165.67.120]: 450 Requested mail action not taken: mailbox unavailable
        2012-04-10 22:08:48 End queue run: pid=31166

        […]

        2012-04-10 22:38:08 Start queue run: pid=31396
        2012-04-10 22:38:09 1SHiQX-000803-MZ => user.name at web.de R=dnslookup T=remote_smtp H=mx-ha02.web.de [213.165.67.120]
        2012-04-10 22:38:09 1SHiQX-000803-MZ Completed
        2012-04-10 22:38:09 End queue run: pid=31396

This has happened to over half of the messages sent since a week.

Some sort of greylisting seems to be in place, but resending it every
half hour appears to confuse the Web.de mail servers. Why it works after
the fourth, sixth or whatever try is also unclear.

2. Yesterday also a message sent from the Web.de account to myself was
delivered late.

        2012-04-11 00:03:18 1SHl1p-0008KL-Ec <= user.name at web.de H=fmmailgate04.web.de [217.72.192.242] P=esmtp S=8367 id=4F84BAB7.3030406 at web.de
        2012-04-11 00:03:18 1SHl1p-0008KL-Ec => myname <myname at example.net> R=local_user T=maildir_home
        2012-04-11 00:03:18 1SHl1p-0008KL-Ec Completed

The message header looks like the following.

        Received: from fmmailgate04.web.de ([217.72.192.242]) by mail.gw90.de with
         esmtp (Exim 4.69) (envelope-from <user.name at web.de>) id 1SHl1p-0008KL-Ec
         for myname at example.net; Wed, 11 Apr 2012 00:03:17 +0000
        Received: from moweb002.kundenserver.de (moweb002.kundenserver.de
         [172.19.20.108]) by fmmailgate04.web.de (Postfix) with ESMTP id
         C23DF75C3904 for <myname at example.net>; Wed, 11 Apr 2012
         02:03:07 +0200 (CEST)
        Received: from 192.168.10.x ([91.64.xx.xx]) by smtp.web.de (mrweb002) with
         ESMTPA (Nemesis) id 0MOSAP-1SLIu3320b-005n2u; Wed, 11 Apr 2012 00:57:10
         +0200
        Message-ID: <4F84BAB7.3030406 at web.de>

Header of a second message sent earlier.

        Received: from moweb001.kundenserver.de (moweb001.kundenserver.de
         [172.19.20.114]) by fmmailgate04.web.de (Postfix) with ESMTP id
         36C2775C3CDE for <myname at example.net>; Wed, 11 Apr 2012
         02:04:48 +0200 (CEST)
        Received: from 192.168.10.x ([91.64.xx.xx]) by smtp.web.de (mrweb002) with
         ESMTPA (Nemesis) id 0M5fhI-1S6fs838aO-00xf8G; Tue, 10 Apr 2012 23:23:52
         +0200

But seeing this problem I am thinking they have technical problems or
probably screwed up big time again with their server configuration. The
header shows clearly that the delay happened between their servers
<moweb002.kundenserver.de> and <fmmailgate04.web.de>.

Are both problems unrelated and the second just a temporary technical
error?

Do you have any suggestions? Best thing would be Web.de staff would read
this list and fix it. ;-)

Should another retry interval be used to not confuse the Web.de
greylisting as pointed out in [1]?


Thanks,

Paul


[1] http://siduction.de/index.php?name=PNphpBB2&file=printview&t=2161&start=0
    (in German)
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