4 messages in net.sourceforge.lists.courier-users[courier-users] Keep-alive IMAP
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Troels ArvinMar 15, 2005 2:35 pm 
Chuck WilliamsMar 15, 2005 2:57 pm 
Troels ArvinMar 15, 2005 3:02 pm 
Sam VarshavchikMar 15, 2005 3:46 pm 
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Subject:[courier-users] Keep-alive IMAPActions...
From:Troels Arvin (tro@arvin.dk)
Date:Mar 15, 2005 2:35:21 pm
List:net.sourceforge.lists.courier-users

Hello,

I have a problem where some users using Thunderbird on Windows seem to loose their IMAP connections after a while - to the point where they need to restart the e-mail client. Courier IMAP version is 4.0.1. My MAXDAEMONS is high (500), as is my MAXPERIP (500), so Thunderbird's five concurrent connections shouldn't be it.

To me, it sounds like a problem on Thunderbird. However, I noticed these lines in tcpd/tcpd.c: #ifdef SO_KEEPALIVE ... #endif

Is SO_KEEPALIVE set by any configure-option? If not: Is it unsafe to try to turn it on, to see if it cures the IMAP connection problems that I get reports about?

And what about SO_LINGER? - Would it be relevant to play with? Any dangers?

-- Greetings from Troels Arvin, Copenhagen, Denmark