In Inbox100, adding senders is easy by approving emails or scanning folders for addresses, but you can also whitelist certain senders or domains manually. This is not difficult either, and I have used it to whitelist the "about.com" domain, for example, to make sure I don't have to recover one About newsletter from the Quarantine folder.
To whitelist a sender or domain in Inbox100:
- Click the Inbox100 button on the Inbox100 toolbar.
- Go to the Inbox100 Options tab.
- Make sure Approved List is selected.
- Click Add....
- Type the email address or domain you want to whitelist under Email Address:.
- To whitelist a domain, type the domain name preceded by "*@".
- To whitelist the "about.com" domain, for example, type "*@about.com".
- Optionally, type a descriptive name under Name:.
- Click OK.
- Click OK again.

