Open Pegasus Mail. Click on the File menu and choose "Network Configuration..."

In the left menu, choose Network Configuration.

On the right side fill the POP3 host field with your domain name. In the User name field type in your username. In the SMTP host field type your local internet service providers SMTP server. In case you do not know the SMTP server name, please contact your local Internet service provider and ask them.

In the left hand menu, choose General settings.

On the right side type the name you want people to see in the Pesonal name field. Put your email address in the Default reply address field. Click OK. You are now ready to check your mail!