You might use the friends list to protect your favorite newsletters from being treated like spam in particular. I have, for example, added "about.com" to the list to ensure I'll always get all my About newsletters.
Add a Sender to the Friends List in MailShield Desktop
To add a sender to the friends list in MailShield Desktop:
- Select Friends from the toolbar in MailShield Desktop.
- Click Add.
- Type the email address or domain name you want to whitelist.
- To whitelist all About newsletters enter "@about.com".
- Click OK.

