Okay, you know more about SBCGlobal and AT&T than I do. But I think you're limiting the number of views you'll get because there are a lot more AT&T customers than there are people with an SBCGlobal email address.
Cox.com and mc.cox.com are two separate domains. Everthing to the right of the "@" is a domain.
I checked out your post in the AT&T Forum and it was edited to remove all references to cox.help@cox.com. I see 10 views and at least one of those was me. There's been 1 response and it was from the moderator who moved your post to the Email forum. There are 2 followers. Maybe you have a couple of fans.