In order to set up an Email Client (e.g Outlook, Eudora, MAC mail etc.), you need to use the following email settings.
Incoming mail server: mail.yourdomain.com
Outgoing mail server: mail.yourdomain.com
Outgoing mail server does require authentication.
Incoming mail port: 110 for POP3, 143 for IMAP
Outgoing mail port: 25 (If 25 does not work, try 26, as some ISPs block port 25)
Username is the same one as you use for webmail (the full email address).
(If entering "username@yourdomainname" does not work, try "username+yourdomainname")
** No SSL boxes should be checked **