prodigy.net bounce

host ff-ip4-mx-vip1.prodigy.net[144.160.159.21] said: 550 5.7.1 Connections not accepted from servers without a valid sender domain.flph838 Fix reverse DN

Just started receiving 550 error from this Ameritech server.

Checked our mailserser dns through mxtoolbox and google. It is PTR is set set

Propagation checks show all servers responding world wide.

Could you advise issue from your end

Responses

ATTHelp

Community Support

•

231.5K Messages

4 years ago

Hey there, @robmarok,

Your mail server may be being blocked. We’d recommend emailing abuse_rbl@abuse-att.net to check into this further. (Just as a heads up: sending multiple emails to that group will not expedite your request, and may activate that group’s spam filtering.) In the meantime, check out the steps in this article: it has great tips to make sure there's nothing on your mail server that may be triggering this block.

We’d also suggest taking a look at the top reply in this thread. It highlights a lot of common factors that can cause your mail server to be blocked.

Please let us know if you have further questions, @robmarok.

Genevieve, AT&T Community Specialist

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