I changed my relayhost to relayhost = smtp.west.cox.net And I changed my Host setting in the Networking tab on the GUI to elastix.cox.net When I had the Host name set to elastix.myhomeconnection.local, maillog showed that the emails were going out, but out of 3 email addresses I have -- a cox.net and a private domain hosted at 1&1 -- only my hotmail address was receiving the emails. The From address was showing email@example.com and firstname.lastname@example.org, and I figured that 1&1 and Cox would not send them on to me because there is no such domain as a .local. So I changed my Host name in the GUI to elastix.cox.net, and viola, it works. They come to me as Voicemail System [email@example.com]. Hope this helps someone.