I've had good luck emailing them at abuse_...@abuse-att.net. Takes a couple days to hear back from them, but they do generally reply.
On 08/26/2013 01:21 PM, Drew Weaver wrote: > Howdy, > > Does anyone know of a good/working ATT.net postmaster contact? We > have been trying for several weeks to get an IP that has never been > used before removed from the ATT.net blacklist and we aren't > getting replies through the forms on their site. > > Thanks, -Drew >