Re: Filter on postoffice.reston.mci.net

[Dean Gaudet <dgaudet-list-nanog () arctic org>]

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.

Dean

On Wed, 24 Sep 1997, Kevin Houle wrote:

> On Wed, 24 Sep 1997 14:45:01 -0400 (EDT)
> Jared Mauch <jared () puck nether net> wrote:
>
> > Kevin.. it works if you give the proper machine name in the HELO
>
> 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. postoffice.reston.mci.net 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 :)
>
> At any rate, the 'HELO netins.net' statement is a result of
> host masquerading (DMnetins.net). Same thing happens with a
> FQDN :
>
> 220 postoffice.Reston.mci.net ESMTP Sendmail 8.8.5/8.8.5; Wed, 24 Sep 1997 15:16
> :25 -0400 (EDT)
> HELO worf.netins.net
> 250 postoffice.Reston.mci.net Hello kevin () worf netins net [167.142.225.4], pleas
> ed to meet you
> MAIL FROM:<kevin () netins net>
> 550 Access denied
>
> Kevin