Details on how to setup Mac Mail can be found from the link below:
Please remember the following details when trying to setup your mail account:
E-mail Address: The email address you are trying to access
User Name: The email address you are trying to access
Password: The password for the email address
Incoming mail server: mail.yourdomainname.com (replace yourdomainname.com with your domain name)
Incoming mail server port: 143
Outgoing mail server (SMTP): mail.yourdomainname.com (replace yourdomainname.com with your domain name)
Outgoing mail server (SMTP) port: 25 (some ISP’s require this to be 587)
Security: Should be set to none
SSL: Should be set to none
Authentication on the outgoing mail server need to be enabled and set to password in order to send emails through the server.
