firstname.lastname@example.org: host gateway1.att.net[18.104.22.168] said:
550-22.214.171.124 blocked by ldap:ou=rblmx,dc=worldnet,dc=att,dc=net 550
Blocked for abuse. See http://www.att.net/general-info/rblinquiry.html"
reply to MAIL FROM command)
Have you reported that to support? The page indicated in the NDR says that the server administer should contact them )there is an online form to complete) to initiate investigation/removal.
I would do it but I don’t use that mail server.
Yes, I opened a ticket an hour ago with DH.
Good Deal! Thanks!
Thank you for writing. We have contacted AT&T and are waiting for their
response. Thank you for your patience in the meantime.