(Wondering if this hasn't been reported before...)

After updating my mail server and accidentally creating new certificates I failed to connect to the server with Evolution while multiple things got wrong:

* In the account management, trying to receive the possible login methods for TLS crashed
* For SSL the same timed out

After wondering for quite some time (and blaming the server configuration) I found that Evolution was stuck on the bad certificate or to be more precise on the mismatch between the saved certificate and the new one. After deleting .local/evolution/camel-cert.db everything worked fine again.

Possible solution: Ask the user (with a big fat warning) whether the changed certificate is OK or not.