Administration
This function allows you to create, modify, and delete users and aliases, as well as administer the settings for users and aliases.
To administrate your mail accounts you will login through http://mail.yourdomain.com

Alias
Aliases are additional names for a user. They allow messages to be sent to multiple addresses, but end up in the same mailbox. Essentially, an alias is an AKA (Also Known As) for a user.

Auto Reply (Vacation Message)
This function allows a user to change their vacation message (auto-responder.) A vacation message is a response that is automatically sent to anyone who sends an e-mail to a particular address.
For example, you might set up a vacation message for your account that says, "I'm on vacation, and will check my e-mail in two days." Whenever someone sends an e-mail to you, they will receive an automatic response by e-mail telling them that you are out. This is also a useful for sending sales literature or technical support. Vacation messages are only sent once to an e-mail address.

E-mail Forwarding
This function allows a user to change their mail-forward configuration. Mail forwarding is when our mail server forwards e-mail to an alternate e-mail address instead of storing it. When we setup your account, all of your e-mail is forward to the e-mail address you supplied to us. Mail forwarding overrides all other account settings, including messages.

Unlimited POP accounts
Post Office Protocol (POP) accounts are individual e-mail boxes from which mail is retrieved.