Source: fetchmail Followup-For: Bug #926928 I've checked the manpage for fetchmail. There was the following in the stretch package:
--sslcommonname <common name> (Keyword: sslcommonname; since v6.3.9) Use of this option is discouraged. Before using it, contact the administrator of your upstream server and ask for a proper SSL certificate to be used. If that cannot be attained, this option can be used to specify the name (CommonName) that fetchmail expects on the server certificate. A correctly configured server will have this set to the hostname by which it is reached, and by default fetchmail will expect as much. Use this option when the CommonName is set to some other value, to avoid the "Server CommonName mismatch" warning, and only if the upstream server can't be made to use proper certificates. Beside that I think that the bug should be downgraded... Jochen