To enable SMTP authentication in Peagus email please follow the following steps :-

1) Open Pegasus Mail.

2) Click "Tools" and then select  "Internet options".

3) Select the Sending (SMTP) tab.

4) Click on the "Security tab".

5) Under "SMTP Authentication", place a checkmark in the box to the left of Login to the

SMTP server using the following details.

Enter your complete e-mail address in the Username field.

Enter your password in the Password field.

Click OK.

6) Click "OK" at the bottom of the window.

Your  "SMTP Authentication" has been enabled in the PEAGUS.