I have Zimbra running on a server called saladin which has a cname record of mail. When accessing it as mail.example.com it works well, but when addressed as saladin.example.com it breaks with SSL as the certificate is only for mail.example.com.
In my previous setup I just configured Apache to use URL Rewrite and forced all connections to be rewritten to https://mail.example.com/ but I cannot find anywhere to set this in Zimbra.
PS. For those who wonder why use "example.com" it is because I do not wish to be made a complete fool of my superior on his many googles of our domain name... :-)