I have a recurring (but intermittent) issue delivering mail to att.net
addresses and other domains serviced by Prodigy email servers.
It seems their DNS resolution occasionally has issues. I am aware of
no issues serving the PTR records for the mail server involved.
host al-ip4-mx-vip1.prodigy.net[144.160.235.143] said:
550 5.7.1 Connections not accepted from servers without a valid sender
domain.alph753 Fix reverse DNS for 45.77.152.137 (in reply to MAIL FROM
command)
Anyone from Prodigy here or whoever the operator is? Previous attempts
to reach out to that team have not been successful.
TIA,
Dave
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