[NBLUG/talk] OT - Sending mail to comcast.net

[Mark Street]

Hi,

Is anyone else having troubles sending to comcast.net customers?  My mail 
servers have been getting timed out messages since mid to late September.

Nov 17 21:35:56 penguin postfix/smtp[11362]: connect to 
mx2.comcast.net[76.96.30.116]: Connection timed out (port 25)

Nov 17 21:36:26 penguin postfix/smtp[11362]: 39C27E7C517: 
to=<XXXXXXXX at comcast.net>, relay=none, delay=60, status=deferred (connect to 
mx1.comcast.net[76.96.62.116]: Connection timed out)

I used a dns tool to lookup comcast.net's dns info and it returned the 
following which I thought was interesting...

mx1.comcast.net claims to be host IMTA05.westchester.pa.mail.comcast.net [but 
that host is at 76.96.62.45 (may be cached), not 76.96.62.116]. 

mx2.comcast.net claims to be host IMTA22.emeryville.ca.mail.comcast.net [but 
that host is at 76.96.30.39 (may be cached), not 76.96.30.116].

WTF!!!!

$ dig mx comcast.net
; <<>> DiG 9.3.3rc2 <<>> mx comcast.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41239
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 4

;; QUESTION SECTION:
;comcast.net.                   IN      MX

;; ANSWER SECTION:
comcast.net.            16      IN      MX      5 mx2.comcast.net.
comcast.net.            16      IN      MX      5 mx1.comcast.net.

;; AUTHORITY SECTION:
comcast.net.            6389    IN      NS      dns102.comcast.net.
comcast.net.            6389    IN      NS      dns101.comcast.net.

;; ADDITIONAL SECTION:
mx1.comcast.net.        6616    IN      A       76.96.62.116
mx2.comcast.net.        7190    IN      A       76.96.30.116
dns101.comcast.net.     147796  IN      A       68.87.64.204
dns102.comcast.net.     153480  IN      A       68.87.66.204



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