Deb,
Set up a new User Selection, with a single rule to search Active users on the List you want to email. Search the Email Address field with the
!= (not equals) parameter. Enter
%@cox.net in the search text box.
Voila!
When you email this selection it will exclude email address @cox.net
I may eventually move this post to the server Optimizations forum to tip off other administrator's about cox.net's policy.
Please let me know if I can be of further assistance!
Regards