Ever since I started using princeton-ma.us I've had trouble sending or receiving E-mail through my EarthLink account.
EarthLink users may discover that they can receive messages, but cannot send them. Messages seem to be sent, but they are not received by the addressee. You can determine if you have this problem by sending yourself a test message. If you don't receive it, read on . . .
Apparently, EarthLink requires Secure Password Authentication for their outgoing mail server, and princeton-ma does not. Go to the account settings for your EarthLink account in Outlook (or Outlook Express) and UNCHECK the box next to "Require Logon using Secure Password Authorization".
If you prefer, contact EarthLink Support and use their online chat function. They can use their Live Support feature to resolve this problem.