Yeah, I had just found that site after I posted to the list. I found it through an old dslreports forum thread... ---Chris On Mar 27, 2009, at 11:37 AM, David Ulevitch wrote:

On 3/27/09 8:23 AM, Chris Wallace wrote:

...

Can someone from ATT contact off-list with the contact for the mail administrator? We recently got a new CIDR from ARIN and previously belonged to Adelphia. Needless to say, the IP's are pretty much blacklisted everywhere as dynamic IP space. I have gotten them pretty much cleaned up on other mail servers but I can't get a hold of ATT. Any help would be greatly appreciated!

They typically respond / resolve to submissions at this URL within a few hours:

http://worldnet.att.net/general-info/block_admin.html (via http://www.att.net/blocks)

-David