When you have an SSL certificate which is bad, then there does not seem to be any way to prevent being prompted about it every time that Evolution starts.

For example, every time I start up evolution, I get this prompt:
-------------------------------
Evolution warning:
SSL Certificate check for mail.dreamhost.com:

Issuer:            E=support@dreamhost.com,CN=New Dream Network Certificate Authority,OU=Security,O="New Dream Network, LLC",L=Los Angeles,ST=California,C=US
Subject:           E=support@dreamhost.com,CN=*.mail.dreamhost.com,OU=Security,O=Dreamhost.com,L=Brea,ST=California,C=US
Fingerprint:       17:f7:f2:ff:4a:9d:c3:d3:2b:8a:e9:12:47:c4:a4:28
Signature:         BAD

Do you wish to accept?   Cancel / OK
-------------------------------

This certificate is beyond my control, and it would be nice to be able to add it permanently. I have applied the following steps, but the problem persists:

* Open your web hosting site using https in firefox (I used my https webmail - https://webmail.dreamhost.com/ ).
* Double-click on the padlock icon in the status bar at the bottom of the window.
* Click on the security tab.
* Click view certificate.
* Click details.
* Click export.
* Save as an X.509 Certificate (first option).
* Open Evolution.
* Edit>Preferences>Certficates
* Click Import
* Browse to the certificate you just saved, click Open
* This successfully imports the certificate as a trusted authority, but I still get a prompt from evolution, presumably because the certificate name for the shared server doesn't match my mail server name.

The feature request is that it would be nice to be able to say on the "SSL Certificate check" dialog box "accept permanently" or "add as trusted certificate", to be able to solve this once and for all.

There is more discussion about this problem here:  http://ubuntuforums.org/showthread.php?t=800064

If it helps, this is in Evolution 2.22.3.1.