Hi all, I have an IP (207.241.198.2) on our network blocked from sending mail to AT&T. We have confirmed the IP is not sending any spam and is not on any other publicly available lists. The IP also has proper FcRDNS. Reaching out to the [email protected] address has had no effect. Can someone from AT&T please reach out off-list so we can get this issue resolved?
Mail server log excerpt: 2023-09-07 09:45:33 1qeGGC-002MHV-2l ** <> R=dkim_lookuphost T=dkim_remote_smtp H=ff-ip4-mx-vip2.prodigy.net [144.160.159.22]: SMTP error from remote mail server after MAIL FROM:<>: 553 5.3.0 flpd593 DNSBL:RBL 521< 207.241.198.2 >_is_blocked.For assistance forward this error to [email protected] 2023-09-07 09:45:34 1qeGGE-002MII-38 <= <> R=1qeGGC-002MHV-2l U=mailnull P=local S=7057 T="Mail delivery failed: returning message to sender" for <REDACTED> Sadiq Saif
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