On Tuesday, 2003-10-21 at 17:24 AST, Jeff Wasilko <jeffw@smoe.org> wrote:
----- Forwarded message ----- What AT&T is asking is for you to help AT&T to restrict incoming mail to just our known and trusted sources (e.g., business partners, clients and customers). Therefore, we need to know which IP address(es) are used by your outbound e-mail service so we can selectively permit them. Please send this information to the following e-mail address (rm-antiattspam@ems.att.com).
----- Original Message (Sent Monday, 10/20/03) ----- AT&T has an urgent situation with our anti-spam list. In order to continue to allow email to AT&T you need to provide the IP addresses of all your outbound email gateways. If you do not respond immediately, your access may not continue. The required information should be sent to rm-antiattspam@ems.att.com. ----- End forwarded message -----
It sure looks to me that they are referring to outbound (from the customer, through AT&T, to the Internet) mail only. Presumably this means they are going to either block all 25/tcp from their customers except from those addresses on their list. Alternatively they might be routing all outbound customer mail from non-whitelisted machines through a transparent proxy; possibly the proxy would rate limit the amount of mail being allowed. Tony Rall