Hi. I have courier-mta running with IMAP access.
The IMAP access comes from two sources, some regular clients and a webmail server (Squirrelmail). Recently, I had the problem that the webmail service was broken du to "MAXPERIP" setting in imapd config file. It's clear, the access comes from the same host for all users. After increasing this value, I ran into another problem: Thunderbird (maybe other clients too) always tries to DoS an IMAP server. When 10 connections are allowed, thunderbird will use them all. So when a user did some ugly operation (don't know what he did) on his trash mailbox, there were 10 imap processes each consuming 10% of the CPU. This forces the system scheduler to serve this user's stuff all the time. So I have to decrease the limit per IP to stop this behaviour. That will break Webmail access. So there are two questions: * Is there any chance to limit the parallel connections per user account (system-user or imap-user)? system-wide or individually... * Is there any way to set exceptions for the MAXPERIP limit. So hat I can set something different for the webmail server. If none of these is true: Would that be hard to implement? cu, Bernd
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