ATT to Yahoo transition completed


The transition is complete, according to my little widget! All AT&T consumer mailbox domains now have MX records that point directly to Yahoo Mail's infrastructure.

The transition was announced back on June 24th, and here we are, just over a month later, it looks like all domains have switched over.

To recap, affected domains are: ameritech.net, att.net, bellsouth.net, currently.com, flash.net, nvbell.net, pacbell.net, prodigy.net, sbcglobal.net, snet.net, swbell.net, wans.net, and worldnet.att.net.

These are all now fully Yahoo Mail domains, from a sender's perspective. In the past, they were a bit of a hybrid configuration; with AT&T specific inbound mail gateways, and AT&T specific filtering, even though the mail eventually landed in mailboxes hosted on Yahoo Mail's servers.

This means:

  • No more AT&T-specific blocking, so no more having to contact abuse_rbl @ ATT to request unblocking.
  • Yahoo Mail bulk sender requirements (including email authentication, transparent mailing practices, keeping complaints low, etc.) now apply to all sends to all AT&T subscribers.
  • AT&T domains are probably part of the Yahoo CFL (Complaint Feedback Loop), their version of an FBL. (I haven't personally confirmed this. We shall see.)
  • You probably don't need to seed test both AT&T and Yahoo mailboxes separately. I have separate AT&T test mailboxes myself, because they're free to make and their filtering was slightly different than Yahoo's. I guess I can retire those now.
  • The Yahoo Sender Hub is the place to go if you're looking for info or contacts for troubleshooting delivery problems to AT&T mailboxes.

I am reliably informed that AT&T has some good people keeping their consumer mail gateways up and secure; I thank them for their assistance and good work over the years and hope the future holds good things for them all.

August 2, 2025 Update: Well, I might have spoke too soon. Today, folks are seeing problems resolving any MX record for worldnet.att.net. I suspect some sort of DNS oopsie and I imagine folks will fix it as soon as possible. Feel free to check my online tester here to see current status.

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