Text Messages being blocked by AT&T

["Caine, Ronda" <caine () burlingamepolice org>]

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.

Ronda