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kanban #5320

closed

IMAP sometimes fails (from external mail client)

Added by tengu almost 11 years ago. Updated almost 11 years ago.

Status:
k_acceptance
Priority:
Normal
Assignee:
oschad
Category:
-
Target version:
-
Start date:
31 May 2013
Due date:
% Done:

50%

Estimated time:

Description

Hello,

Sometimes, the IMAP server refuses connection with the following error message:

* Account 'PartiPirate': Connecting to IMAP4 server: mail.piratenpartei.ch:993...
[07:15:00] IMAP4< * OK IMAP4 ready 
* IMAP connection is un-authenticated
[07:15:00] IMAP4> 1 CAPABILITY 
[07:15:00] IMAP4< * CAPABILITY IMAP4 IMAP4rev1 UIDPLUS AUTH=PLAIN 
[07:15:00] IMAP4< 1 OK completed 
[07:15:00] IMAP4> Logging xxx.yyy@piratenpartei.ch to mail.piratenpartei.ch using LOGIN
** IMAP error on mail.piratenpartei.ch: stream error
** IMAP4 connection broken
[07:15:00] IMAP4< Error logging in to mail.piratenpartei.ch
*** Connection to mail.piratenpartei.ch failed: login refused.
*** Couldn't login to IMAP server mail.piratenpartei.ch.

The webmail works at the same time (meaning it's just an annoyance for now), and, yesterday, I got this error only in the morning (when I arrived at work, at about 8:00), the service was back at about 8:30 (as it was some non-blocking bug, I don't have the full log of yesterday attempts, so I don't have the exact time… Sorry).

Cheers,

C.

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 #1

Updated by tengu almost 11 years ago

For information: working again

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 #2

Updated by Simon Rupf almost 11 years ago

  • Status changed from New to Needs Work
  • % Done changed from 0 to 50

In the mailserver logs at the time we did not find any failed logins.

I do fetch the emails every five minutes from my fetchmail setup and log every error that occurs. I could also not find such errors there. If it happens again, please provide us with an update at what times this occurs, so we can look it up in the logs.

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 #3

Updated by Simon Rupf almost 11 years ago

  • Status changed from Needs Work to Needs Feedback
  • Assignee set to tengu
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 #4

Updated by oschad almost 11 years ago

We had a SSH tunnel working between load balancer and mail server cause of security default settings of dovecot and the capabilities of nginx. I think that this channel was sometime broken, had some messages inside.

I changed that setup, so this shouldn't happen again.

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 #5

Updated by oschad almost 11 years ago

  • Tracker changed from Bug / Feature to kanban
  • Status changed from Needs Feedback to k_acceptance
  • Assignee changed from tengu to oschad
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 #6

Updated by tengu almost 11 years ago

Hello,

Just so that you can check the logs now:

[08:34:49] IMAP4> Logging xxx.yyy@piratenpartei.ch to mail.piratenpartei.ch using LOGIN
** IMAP error on mail.piratenpartei.ch: stream error
** IMAP4 connection broken
[08:34:49] IMAP4< Error logging in to mail.piratenpartei.ch
*** Connection to mail.piratenpartei.ch failed: login refused.
*** Couldn't login to IMAP server mail.piratenpartei.ch.

It just happened now - Oli told me last Saturday to let you know with some timestamp if this happens again. So here it is.

Guess it will be up again in a few minutes.

Cheers,

C.

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 #7

Updated by oschad almost 11 years ago

Found the issue: I've upgraded the max count connections per user to higher number. I did that already but in the wrong config :-/

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 #8

Updated by tengu almost 11 years ago

cool, thank you!
I also hit in this kind of friendly bug with some other mail server… hard to detect if we don't know what we're searching for.

Anyway, thanks for the fix !

I guess you can close this issue - if I stumble on something else, I'll open a new one.

Cheers,

C.

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