Anyone from AT&T on the list that can assist with the blacklisting of the IPs:
23.239.97.150 5.101.141.35 Message is 553 5.3.0 alph749 DNSBL:RBL 521< 23.239.97.150 >_is_blocked.For assistance forward this error to abuse_...@abuse-att.net As is the usual case, I've gotten no response from an inquiry to abuse_...@abuse-att.net. I sent one to abuse_...@abuse-att.net for 23.239.97.150 on July 2nd and no response. To be fair, I wrote abuse_...@abuse-att.net about 5.101.141.35 just yesterday (July 4th) so it really hasn't been 24 hours yet, but past experience has taught me that I rarely get a response from an inquiries sent to abuse_...@abuse-att.net. I suspect that this is being blocked because these are new IPs that AT&T has never received mail from, so they block them by default. Is there an official way to inform AT&T before trying to send mail from new IPs that new IPs will be sending mail? As far as I know AT&T is the only service that outright blocks messages from new and unseen IP addresses by default.
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