[64384] in North American Network Operators' Group
Re: Heads-up: AT&T apparently going to whitelist-only inbound mail
daemon@ATHENA.MIT.EDU (Tony Rall)
Tue Oct 21 17:42:33 2003
In-Reply-To: <20031021212413.GB13323@jane.smoe.org>
To: nanog@nanog.org
From: Tony Rall <trall@almaden.ibm.com>
Date: Tue, 21 Oct 2003 14:39:01 -0700
Errors-To: owner-nanog-outgoing@merit.edu
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
