[40147] in North American Network Operators' Group
Re: trapdoor.merit.edu and other impatient Postfix mailers everywhere
daemon@ATHENA.MIT.EDU (Joel Baker)
Thu Aug 2 14:35:57 2001
Message-ID: <20010802183524.22330.qmail@dogma.lightbearer.com>
From: "Joel Baker" <lucifer@lightbearer.com>
In-Reply-To: <2098758637.20010802132239@conti.nu> from "kai@pac-rim.net" at "Aug
2, 2001 01:22:39 pm"
To: nanog@merit.edu
Date: Thu, 2 Aug 2001 12:35:24 -0600 (MDT)
MIME-Version: 1.0
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Errors-To: owner-nanog-outgoing@merit.edu
kai@pac-rim.net wrote:
>
> If you are receiving larger numbers of reports about failing mail
> transport from your customers these days, here is why.
>
> Apparently, the nameservers for the blackholes.mail-abuse.org and
> dialups.mail-abuse.org zones are overloaded (I get <10% ICMP_echo's
> back, and virtually never any DNS answers), causing a more than
> 60-second connection-established -> 220 Hello banner
> answering delay on typical Unix-based Sendmail (and other SMTP)
> servers with default DNS resolver timeouts.
http://www.mail-abuse.org/subscription.html
Perhaps this is related? (Server blocked off, rather than answering with
a query-denied, perhaps?)
--
***************************************************************************
Joel Baker System Administrator - lightbearer.com
lucifer@lightbearer.com http://www.lightbearer.com/~lucifer
