Emails blocked and firstname.lastname@example.org unresponsive
We've had a couple of dedicated IP addresses that we've sent email from for years and everything was fine but unfortunately a couple of months ago we were forced to migrate to a couple of new dedicated IP addresses. Since the IP migration we've been receiving blocks when attempting to get business related emails to *@att.net and *@bellsouth.net addresses.
[email scrubbed] 5.3.0 alph761 DNSBL:RBL 521< XXX.XXX.XXX.57 >_is_blocked. For assistance forward this error to email@example.com
[email scrubbed] 5.3.0 alph771 DNSBL:RBL 521< XXX.XXX.XXX.58 >_is_blocked. For assistance forward this error to firstname.lastname@example.org
We've sent a few emails so far to email@example.com with details of the blocks but have yet to hear back outside of receiving an automated email.
Can @ATTBusinessForums or @ATTBusinessCare assist with finding out the current status or escalate the issue for us?