Hi, anyone from Comcast on this list? I have a few questions I wanted to verify with you. I noticed some Comcast servers are intermittently returning "550 5.1.0 Invalid sender domain (in reply to MAIL FROM command)" for emails coming from the same domain/servers.
Greatly appreciated if you can reach back directly off the list. _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
