[NSRCA-discussion] Road Runner e-mail delivery problems

[Tom Simes]

For those on rr.com (who can't get this e-mail, but may be following via
the web archives), I've opened ticket ID [security.rr.com #55518] with
them to investigate why their mail servers are deferring mail delivery
from the NSRCA list server to RR customers.  For those familiar with
e-mail and SPAM control at the ISP level, the list server isn't on any
DNS RBL lists or anything like that.  The problem is that for some
reason the RR.com mail servers cannot resolve the list server IP address
back to a hostname so they are refusing to accept e-mail.

Looking at the logs, the problem started early yesterday morning (Oct.
22nd).  The failures look like this:

$ telnet 75.180.132.244 25
Trying 75.180.132.244...
Connected to cdptpa-smtpin02.mail.rr.com.
Escape character is '^]'.
421 4.7.1 - Connection Refused.  Cannot resolve PTR record for
209.112.194.3 Connection closed by foreign host.
$

Tom
 
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   "Z-80 system stack overflow.  Shut 'er down Scotty, the system's
         sucking mud" - Error message on TRS 80 Model-16B

Tom Simes                                       simestd at netexpress.com 
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