I am having a problem that started last Friday. Text messages sent from my domain seem to be being blocked by AT&T. Does anyone have a direct contact at AT&T who might be able to assist us in getting unblocked?
Thank you in advance for any assistance you can offer.
AT&T does a kind of spam filtering on texts. AFAIK the only solution is to either send your texts via one of AT&T’s pay-for messaging channels, or get the receiving party to complain to their AT&T support rep. If you’re the receiving party, just call and say you want to whitelist an SMS source.