Subject: Bounces with bogus DNS error messages

From: Ralf Baechle <[email-masked]>
Date: Sat, 17 Aug 2002 00:34:02 +0200

I'm observing Zmailer bouncing mails with bogus error messages since a
while.  The error messages all look like:

[...]
FAILED:
  Arrived Recipient:
      rfc822;[email-masked]
  Original Recipient:
      rfc822;[email-masked]
  Final Recipient:
      RFC822;[email-masked]
  Status:
      5.4.4 (DNS lookup report)
  Last Attempt Date:
      Thu, 15 Aug 2002 11:40:29 +0200
  X-ZTAID:
      smtp[5063]
  Diagnostic Code:
      ^M-> DNSreply: len=364 rcode=0 qd=1 an=1 ns=10 ar=4^M-> 80365s MX[0] p=10
+'mailin.snailmail.de'^M-> getaddrinfo(INET, 'mailin.snailmail.de','0') -> r=-2
+(Name or service not known); ai=%p^M-> No addresses for
+'mailin.snailmail.de'[0]^M-> nmx=1 maxpref=66000 realname=''^M=> NONE of MXes
+support SMTP!
  Control data:
      smtp foonet.de [email-masked] 99
  Diagnostic texts:
      -> DNSreply: len=364 rcode=0 qd=1 an=1 ns=10 ar=4
     -> 80365s MX[0] p=10 'mailin.snailmail.de'
     -> getaddrinfo(INET, 'mailin.snailmail.de','0') -> r=-2 (Name or service
+not known); ai=%p
     -> No addresses for 'mailin.snailmail.de'[0]
     -> nmx=1 maxpref=66000 realname=''
     => NONE of MXes support SMTP!
[...]

(Addresses have been changed in above example)

In all cases a manual verification of the DNS information found that
the nameserver of the machine running zmailer was returning information
including proper MX records and A records for all mail exchangers.

The machine in question is running the resolver from Redhat 7.2's
glibc 2.2.4 package and Zmailer 2.99.55 from CVS.

Another nit - obove error message contains actual ^M characters in the
bounce without accompaning \n characters.  That leaves propper display
of the error message in the hands of the MUA's creativity but will
hardly result in something nicely formatted ...

Thanks for any hints,

  Ralf
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