Evolution won't work with IMAP-SSL

[el3ktro]

I have a strange problem with Evolution. I'm running my own dedicated mailserver ith courier-imap and postfix. I have a self-signed SSL certificate for both. I can connect to my server via TLS from all kinds of mail programs, it works with Thunderbird, KMail, my mobile, Squirrelmail web access etc. - only Evolution fails to connect to my server when I enable TLS, it only works unencrypted. I don't see where the problem is, and Evolution doesn't have any option I could try to set or unset - it simply says that "SSL negotiation failed (loosly translated from German). May my self-signed cert be the problem? I don't know what I could re-config on my server either, because it works perfectly with all other mail clients.

I'd appreciate any thoughts on that issue, I'm stuck

Tom