If you want to use the Non-SSL certificate 

Incoming Mail Server:
  • POP3 - mail.yourdomainname.com PORT 110 
  • IMAP = mail.yourdomainname.com PORT 143


Outgoing Mail Server:

  • SMTP - mail.yourdomainname.com PORT 25
To view emails online - webmail.yourdomainname.com  


If you want to use the SSL certificate 

Incoming Mail Server:
  • POP3 - mail.yourdomainname.com PORT 995 (SSL)  
  • IMAP = mail.yourdomainname.com PORT 993 (SSL)


Outgoing Mail Server:

  • SMTP - mail.yourdomainname.com PORT 587 (TLS)