Filter on

Kevin.. it works if you give the proper machine name in the HELO

  at least for me:

telnet 25
Connected to
Escape character is '^]'.
220 ESMTP Sendmail 8.8.5/8.8.5; Wed, 24 Sep 1997 14:44:12 -0400 (EDT)
250 Hello [], pleased to meet you
250 <>... Sender ok
221 closing connection
Connection closed by foreign host.

Kevin Houle boldly claimed:

MCI's iNOC pretty much confirmed there was a filter in place,
as did the systems person I finally reached thanks to some
key responses from this list. Probably a spam relay block of
some kind. The '550 Access denied' reponse is that they use
in their SMTP filters. was down for
two hours and counting when I got them on the phone, so with
local MCI users not being able to send mail, I was not a high
priority :slight_smile:

At any rate, the 'HELO' statement is a result of
host masquerading ( Same thing happens with a

220 ESMTP Sendmail 8.8.5/8.8.5; Wed, 24 Sep 1997 15:16
:25 -0400 (EDT)
250 Hello [], pleas
ed to meet you
550 Access denied


FWIW I too see this when attempting from one address, but not from
another. Both addresses are in MCI customer-owned ip blocks. Both
addresses have correct double-reverse lookups. It's more than just a bit
annoying ... especially when I receive mail from MCI's noc and cannot
reply to it unless I go through hoops to route it through another box.