How to tell postfix to quit sending the same mail over and over again

[Skale, Franz]

Hi  Torben,
i had the same issue some time ago.
I ended up checking amavis and clamav.
Check the logfiles:
/var/log/amavisd.log
/var/log/clamav/clamav.log
for errors.
Also check wallaced and the pykolab logfile.
Stop wallace and start it in the foreground using the options:
  -d DEBUGLEVEL, --debug=DEBUGLEVEL
                         Set the debugging verbosity. Maximum is 9, 
tracing
                         protocols like LDAP, SQL and IMAP.

E.g:
/usr/sbin/wallaced -l debug -d 9 --user kolab
Examine the output !

I changed my scan settings for clamav: (clamd.conf) SSD Storage !
MaxScanSize 200M
MaxFileSize 100M

Hopefully it will help you to get to the root cause !
Best regards
Franz


Am 2019-04-24 19:32, schrieb T. Mohrfeldt (Liesegang GmbH):
> Thanks for your input, Chris,
> 
> I already looked at the postfix queue, and occasionally see the
> aforementioned mail,
> but each time with an new ID, so deleting might stop one mail from
> heading off, but not the flood.
> 
> I fear looking in maillog, because I'm super bad at finding the
> relevant parts (especially with >50 users accounts and their
> interactions), but I might to take a bite of that sour apple and poke
> through...
> 
> My theory is that the receiving server doesn't signal my server the
> complete transmission of the mail, but it's just a wild guess.
> And so I need to stop that on my side, but I am really puzzled from
> where postfix get's the mail handed over...
> 
> 
> Torben
> 
> --
> 
>  LIESEGANG GMBH
> 
> Stadtweg 22 • 24837 Schleswig
> 
> Tel.: +49 (4621) 99 46 07 3
> Fax: +49 (4621) 99 46 07 0
> GPG/PGP ID: CE040A70
> 
> 
> Am 24.04.2019 17:52, schrieb Chris Fleming:
> 
>> I would start by looking at postfix queues:
>> 
>> mailq - will list everythings in queues. You can delete using
>> 
>> postsuper -D
>> 
>> Also I presume that you've checked the mail logs, to see if there are 
>> any clues?
>> 
>> Cheers Chris
>> 
>> On 24/04/19 at 04:06pm, T. Mohrfeldt (Liesegang GmbH) wrote:
>> 
>>> Hello fellow Kolab users,
>>> 
>>> I'm struggling with a serious problem here.
>>> 
>>> One of my users sent a very large e-mail (round about 32m) to a 
>>> business partner of us. All went as expected. But my server won't 
>>> stop sending this particular mail. I already deleted it from the 
>>> users mailbox (via bash and via roundcube) nontheless the floodgates 
>>> are still open and roughly all 15 seconds our business partner 
>>> receives this mail.
>>> 
>>> Till now he's a good sport about it, but I'd rather stop his agony 
>>> and put an halt to this.
>>> 
>>> But I have no clue from which service/directory/whatever this e-mail 
>>> gets pumped into postfix.
>>> 
>>> ANY hints where exactly to look and how I can stop this behaviour is 
>>> HIGHLY appreciated from my side.
>>> 
>>> Server: CentOS7 System and Kolab fully patched.
>>> 
>>> With kind regards
>>> 
>>> Torben Mohrfeldt
>>> 
>>> --
>>> 
>>> LIESEGANG GMBH
>>> 
>>> Stadtweg 22 * 24837 Schleswig
>>> 
>>> Tel.: +49 (4621) 99 46 07 3 Fax: +49 (4621) 99 46 07 0 GPG/PGP ID: 
>>> CE040A70 _______________________________________________ users 
>>> mailing list users at lists.kolab.org 
>>> https://lists.kolab.org/mailman/listinfo/users
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