Thank you for your helpful hints on debugging this issue. I wanted first to get
the mail which generates this error but unfortunately the user already deleted
it as well from his trash. Now I got another hint and it looks like this mail
had a big attachment to it. Is it possible that spamc generated this error due
to the size of the mail?
Regards
ML
On Thursday, January 15, 2015 8:29 AM, Steffen Kaiser
<skdove...@smail.inf.fh-brs.de> wrote:
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On Thu, 15 Jan 2015, ML mail wrote:
It would be better to have the original question & discussion at the top,
so one could cut and read nicely,
> On Wednesday, January 14, 2015 9:06 PM, Pascal Volk
> <user+dove...@localhost.localdomain.org> wrote:
> On 01/14/2015 03:05 PM, ML mail wrote:
>
>> Hello,
>>
>> I am using the antispam plugin of Dovecot with SpamAssassin and in some
>> cases when users move back mails from the Spam folder to their INBOX (false
>> positive) they get the following error message:
>>
>> [SERVERBUG] failed to send mail
> # 2.1.7: /etc/dovecot/dovecot.conf
> # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.8 ext4
[cut]
> plugin {
> antispam_backend = pipe
> antispam_pipe_program = /usr/bin/spamc
> antispam_pipe_program_args = -d;my-mx-server.domain.com;-u;amavis
> antispam_pipe_program_notspam_args = -L;ham
> antispam_pipe_program_spam_args = -L;spam
> antispam_pipe_tmpdir = /tmp
> antispam_signature = X-Spam-Flag
> antispam_signature_missing = error
> antispam_spam = INBOX.Spam;INBOX.Junk
> antispam_trash = INBOX.trash;trash;INBOX.Trash;Trash;INBOX.Deleted
> Items;Deleted Items;INBOX.Deleted Messages;Deleted Messages
> antispam_verbose_debug = 1
What does the Plugin log?
[cut]
> service quota-warning {
> executable = script /usr/local/bin/quota-warning.sh
> unix_listener quota-warning {
> user = vmail
> }
> user = vmail
> }
You seem to use a virtual user configuration, so the antispam plugin
executes spamc as user vmail, correct?
What happens if you run the program manually?
sudo -u vmail /usr/bin/spamc -d my-mx-server.domain.com -u amavis -L ham \
< message
You can also trace the program with a wrapper script. Replace
antispam_pipe_program with /usr/local/bin/spamc-wrapper
==== BEGIN /usr/local/bin/spamc-wrapper
#/bin/bash
( # when and who
date;id;
let i=0
# what
echo /usr/bin/spamc "$@"
# see embedded spaces in arguments
for arg; do
let i=i+1
echo "Arg#$i: '$arg'"
done
# call original program
/usr/bin/spamc "$@"
# log return code / exit code
rc=$?
echo rc=$rc
# Make sure the rc is returned back to caller
exit $rc
# log everything into a file
) >>/tmp/spamc-wrapper.log 2>&1
==== END
If you have lots of simultaneous calls, create one log file per call ->
add .$$ to filename.
- --
Steffen Kaiser
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