Emails blocked and abuse_rbl@abuse-att.net unresponsive

We've added an additional dedicated IP address for sending emails and are having problems with this IP address being blocked by att email servers.  I was able to get our older IP address unblocked via this forum.

Can @ATTBusinessForums or @ATTBusinessCare reach out to me for our newer IP address that is blocked and help get it unblocked?

Thank you, Mark.