Sendmail: host name lookup failure

Joe Kraft hishadow at
Thu Jan 20 13:28:42 PST 2005

Paul A. Hoadley wrote:
> On Mon, Dec 20, 2004 at 10:54:42PM +1030, Paul A. Hoadley wrote:
> I am told it's running Windows 2000 DNS Server.  Presumably that's
> Microsoft's own DNS implementation built into Windows 2000.

> (By 'sometimes' I don't mean it's non-deterministic.  Every time
> sendmail asks for the AAAA record of an unqualified hostname, the
> nameserver responds with SERVFAIL.)
> The consequence of this is that sendmail repeatedly defers delivery
> until the mail expires.
>>Curiously, sendmail's WorkAroundBrokenAAAA option did not help, and
>>I don't know why.  Daryl Tester suggested using a mailertable entry,
>>and this worked.
> I still don't know why WorkAroundBrokenAAAA isn't working in this
> case.
   I'm running into the exact same problem.  My dns is a Win2k server, 
the mail server is FBSD5.3 called kara.home.local.  The dig to 
kara.home.local works fine, but to kara fails.

have you found out any more about why it's not working?  I'm also 
curious about the entry in mailertable because my feeble attempt didn't 

I appreciate any info you can pass on.


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