What is a Forwarder?
Forwarders allow you to change how the delivery of mail takes place. A forwarder will send a copy of all mail from one account to another. For example: You have two accounts called joseph@mydomain.com and joe@mydomain but you only want to check joe@mydomain.com to receive mail from both accounts. You can set up a forwarder from joseph@mydomain.com to joe@mydomain.com so all messages sent to joseph@mydomain.com will en up in joe@mydomain.com's inbox.
Forwarder Tip
Instead of creating multiple email accounts and forwarding them to another account, you can simply set up forwarders. If you set up an email account and a forwarder to forward mail, copies of the messages that are forwarded will also be stored in the account (this creates 2 copies of every message). If you only set up a forwarder, and no account, you'll only be storing one copy of each mail.