Instead of creating a proper mailbox for a new email address, you may prefer to setup up an email redirect instead. In this way you can access email without making any changes to your existing email program. Note however that this is not an ideal situation, as if spam is forwarded through this redirect, it can appear that YOU are the spammer which can result in difficulties for your domain.
To create an email redirect:
1) Log in to the control panel for your domain.
2) Click on the Forwarders icon
3) Click on "Add Forwarder"
4) Enter the mailname that you want to create (eg "bob", not the full address) for forwarding in the Address box
5) Enter the email address that you want to redirect to. This can be any one of your POP3 email mailbox accounts or an outside email address (such as the email address provided by your internet connection provider, or gmail, Yahoo etc).
6) Click Add Forwarder
Email will begin forwarding to the address that you specified.
Once created a Forwarder cannot be edited, but can be deleted and replaced at any time. You can also have two or more forwarders running for the one email address if you wish.
If you ever decide that you would like a true mail box instead of a forwarder, simply create an Email Account for the same address and then delete the forwarder.