Try sending them this:
I am having trouble with receiving notification emails from a site I subscribe to. I have contacted the webmaster there and he says that it is happening to all of his users from sbc and only at sbc. The problem seems to be with a prodigy.net relay server. Here is one of the log entries with the error listed (with the email address replaced with ??????). All emails going to sbcglobal.net users are getting this error. They are running FreeBSD Unix running sendmail. Anything you can do to help would be great:
Sep 15 00:03:24 turbodieselregister sendmail[41832]: m8F41AgP041790: to=??????@sbcglobal.net, ctladdr=webmaster@turbodieselregister.com (1007/1007), delay=
00:02:14, xdelay=00:00:01, mailer=esmtp, pri=120673, relay=sbcmx1. prodigy.net. [207. 115. 21. 20], dsn=5. 6. 0, stat=Data format error