Mailing List CGatePro@mail.stalker.com Message #106275
From: Lyle <lyle@lcrcomputer.net>
Subject: Re: Bogus "non-existent domain in From:" bounce
Date: Wed, 14 Dec 2016 19:17:21 -0600
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>

the authoritive name servers for txercoupemuseum.org  are:


ns1.fatcow.com 65.254.254.100

ns2.fatcow.com 65.254.254.101

ns3.fatcow.com 65.254.254.120

Looks like they are all on on /24 subnet.  Traceroute shows all three pass through 216.55.5.134(xo network)

The above three ip addresses show as belonging to The endurance International Group, Inc as part of a /19 they have and show an address in Burlington, MA.


My first guess is you are hitting DNS when all three have disappeared from the Internet and you don't have valid info in your DNS server's cache. 


My guess is that it's a DNS problem on their end and their fatcow DNS servers are disappearing from the Internet from time to time.


For my company, I rent a server from Linode in their Dallas/Ft Worth, Texas data center as a slave for the two DNS servers in house.  Then an outage here does not drop DNS resolution and generate the non-existance message you are getting.

Lyle Giese
LCR Computer Services, Inc.

On 12/14/16 18:22, Gib Henry wrote:

From time to time I receive copies of my server’s outgoing bounce messages (from mailerdaemon) with the offending incoming messages attached.  The reason stated for the bounce, in this case, is that there is a non-existent domain in the From: header of the incoming message.  However that is not true; the domain name txercoupemuseum.org does exist:

/usr/bin/host -t a txercoupemuseum.org
txercoupemuseum.org has address 65.254.227.240

The log shows:

17:40:04.000 1 DEQUEUER [2420011] SYSTEM(gib) failed: non-existent domain (txercoupemuseum.org) in From:
17:40:04.802 2 SMTP-000007(*) [2420014] sent encrypted [192.168.1.2]:50534 -> [97.78.41.43]:2501, 
    got:250 4123891 message accepted for delivery

Do I have a DNS problem?  It happens too rarely to justify increasing the log level, but…?  Cheers,
--
Gib Henry

#############################################################

This message is sent to you because you are subscribed to

  the mailing list <CGatePro@mail.stalker.com>.

To unsubscribe, E-mail to: <CGatePro-off@mail.stalker.com>

To switch to the DIGEST mode, E-mail to <CGatePro-digest@mail.stalker.com>

To switch to the INDEX mode, E-mail to <CGatePro-index@mail.stalker.com>

Send administrative queries to  <CGatePro-request@mail.stalker.com>

Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster