Outgoing email Cox server shows offline.

First all of a sudden my password was no good. Tech Support solved that but ever since I have not been able to send email on the Cox Server from my IMAC desktop. I receive emails fine. My iPhone and iPad are connected on the same WIFI network and I can send and receive emails fine on both of those devices. This has been going on for 3 days now and only help is are your settings correct. They are. Any help would be appreciated. Thanks in advance.