First up on the Battle of the Domain Email Services is Plain Old IMAP or POP3. The advantages of this are:

• You don’t have to rely on another company. Your mail is still kept on your server.
• You can use Thunderbird or Outlook to read your email.
• You get to pick how big your mailbox is and things like that.

The disadvatages are:

• You have to use Thunderbird or Outlook.
• If you use POP3 you’ll have a hard time checking your mail on more than one computer.
• You have to set up everything yourself.