Strange happenings with my mailman lists that I do not understand.

First, the root address changed from my domain to swweb4.smartnoc.net without my doing anything. Now when try to use the previous address (for ex. http://deannamascle.com/mailman/admindb/deannatest_deannamascle.com)

all I get is an error page.

Even worse, when I send a message to the list I get notification it is pending but when I log on it is not there.

What is going on?

Deanna