Select Preferences > Network Configuration from the File menu. In the left
side of the box, the Receiving Mail icon should be highlighted. Type in your
mail host(your domain name) and username.
Click Set Password. Enter your password.
Click on the Sending Mail icon on the left. In the Relay Host box, type in
the name of your SMTP host, which should have been supplied to you by your
local ISP.
Optional: If you wish to specify a return email address that is different
than your regular POP address, type that address in the From box. Normally
you will use your regular email address, but you can enter a different email
address if you like.
Click OK to save your settings information.
You are now ready to send and receive mail using Pegasus.