[188985] in North American Network Operators' Group
Re: contact with mail support for domain cisco.com
daemon@ATHENA.MIT.EDU (Hugo Slabbert)
Thu Apr 28 11:37:09 2016
X-Original-To: nanog@nanog.org
Date: Thu, 28 Apr 2016 08:37:04 -0700
From: Hugo Slabbert <hugo@slabnet.com>
To: Piotr <piotr.1234@interia.pl>
In-Reply-To: <0539596b-7365-c0b4-34f4-8d2cf86a43ef@interia.pl>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
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On Thu 2016-Apr-28 09:48:09 +0200, Piotr <piotr.1234@interia.pl> wrote:
>Hi,
>
>There is a problem with sending emails from employees in @cisco.com=20
>domain to some certain domain. Emails in opposite direction pass=20
>without problem. No errors, warnings or any other logs at cisco's=20
>employees desktop.. We checked popular rbls, spamhauses, senderbase=20
>etc. Other domains on the same MX cluster receive emails from=20
>@cisco.com..
>
>I try to get help in many ways ( cisco tac, a few account managers,=20
>channel partners) but without success..
>
>Big thanks for contact via email: peter.handke.1966 at gmail.com
>or any other advice
You've given us damn near zero information to go on. Are you with Cisco? =
=20
Or managing some of these "certain domains" to which cisco.com addresses=20
cannot send? It sounds like the latter and that seems more plausible as=20
I'd be pretty surprised to find a cisco.com postmaster sending a vague=20
request like this to nanog. I don't really get how TAC would be involved;=
=20
have you tried postmaster@cisco.com? Assuming that you *are* the receiving=
=20
side, what logs do you have on this? What are the names of these "certain=
=20
domains"? Are they all under the same administrative control / same MXs=20
(I'm assuming yes)?
This also seems like something for mailop[1] rather than nanog. Fair=20
warning; they're using Let's Encrypt and are having trouble with the=20
rollover, so the cert's expired again.
>best regards,
>Peter
--=20
Hugo Slabbert | email, xmpp/jabber: hugo@slabnet.com
pgp key: B178313E | also on Signal
[1] https://chilli.nosignal.org/mailman/listinfo/mailop
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