Gmail - General Tips for Receiving All of Your ALT.com Emails:
1. In the "Quick Contacts" section on the left side, click "Add Contact". In the resulting text box, type each of the following email addresses and click the "Save" button after each entry.
2. It's a good idea to routinely check your spam, junk and blocked email folders to see if any ALT.com messages were routed there by mistake.