Pegasus

Click on Tools, Options

Click on General settings :

For Personal name type your real name here.

For Default reply address should be your email address (ex. username@airmail.net)

Click on Network configuration

For POP3 host enter mail.nrg.com.au
For User name type the same username you use to dial in with here in lowercase.
For Password type the same password you use to dial in with here in lowercase.
For SMTP host type mail.nrg.com.au
Now click OK and you should be all set to use Pegasus Mail for NRG.