Looking for contact from either ATT.net (@txt.att.net) or T-Mobile (@tmomail.net)

Hi Folks,

I'm seeing TXT messages leaving our network to @txt.att.net and
@tmomail.netusers. The messages look very spammy. I'm wondering if
there have been any
complaints of TXT spam from the IP address 66.36.240.39 (messages are From:
DavidBanks@tmsg4.com).

I have examples if you are interested in seeing them. Please contact me
off-list.