You’ll need to enter your Incoming and Outgoing settings on the next tab.
Server — This is example mail server name. The example above uses imap.example.com for the incoming server. If you’d prefer a POP connection, you would use pop.example.com instead. The outgoing server is always smtp.example.com.
Make sure you only enter your mail servername.
Do not use a subdomain such as mail.example.com. You may get an insecure warning if you use the wrong mail hostname
Port — If you chose IMAP, the secure port is 993. For outgoing ports, use 465 or 587.
Port 465 with SSL is recommended, however, some email clients are unable to use this port.
If you are unable to use port 465, the next best option is port 587 using STARTTLS.
Encryption — SSL/TLS.
Require logon using Secure Password Authentication — Check this box.