Koozali.org: home of the SME Server

Obsolete Releases => SME Server 7.x => Topic started by: Troels on December 10, 2009, 12:07:50 PM

Title: IMAP users go offline
Post by: Troels on December 10, 2009, 12:07:50 PM

SME server version: 7.4

I have 6 IMAPS users that frequently goes Offline in Outlook 2007, they say it happens many times in a work day. The users are all behind the same internet connection. I have checked their internet connection and its stable. I'm looking for advice on where to look for more information that can guide me in the right direction, because right now i have several theories.

I have read that Outlook doesn't send / handle IMAP IDLE and NOOP in time. The time interval should be under 29 minutes, but outlook sends IDLE every
30 minutes to correct this i have configured send receive groups to 15 minutes and 1 minute if outlook goes offline, but still the users go offline many times a day.

The next thing I thought, if this was an SME server problem, so I started to look in the IMAP logs (/var/log/imaps) to see if this may be related to some
connection limitation.
# cat /var/log/imaps/current | tai64nlocal | grep 50/50
0 results
# cat /var/log/imaps/current | tai64nlocal | grep 2000/2000
0 results

It doesn't look like it is.

The next thing I'm going to try is to switch users over to plain imap, to rule out that it is an imaps issue.

If one of you guys have time I'd be willing to pay for some support, because the customer is really mad at us.
my phone number is +45 2279 1234 feel free to call anytime.
 

Title: Re: IMAP users go offline
Post by: mmccarn on December 10, 2009, 03:25:32 PM

IF these users are all remote to your SME, and are behind a single public IP address, you probably need to change the settings for 'ConcurrencyLimitPerIP' as described at http://wiki.contribs.org/Email#.22concurrency_limit_reached.22_when_using_IMAP:

Code: [Select]

config setprop imap ConcurrencyLimitPerIP 20
config setprop imaps ConcurrencyLimitPerIP 20
signal-event post-upgrade; signal-event reboot
You should be able to verify whether or not this is the issue by looking at /var/log/imaps/current

Title: Re: IMAP users go offline
Post by: Troels on December 10, 2009, 06:04:16 PM

I have these setting on the server and i can't see that it ever reaches the 50 boundry.

[root@lancent0smevm1165 ~]# config getprop imap ConcurrencyLimitPerIP
50
[root@lancent0smevm1165 ~]# config getprop imaps ConcurrencyLimitPerIP
50

Thanks for helping