Newsgroups: comp.mail.sendmail
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!malgudi!osc.edu!karl.kleinpaste
From: karl.kleinpaste@osc.edu
Subject: Re: Sendmail host canonicalization broken?
Message-ID: <1991Apr13.143839.8175@oar.net>
Sender: news@oar.net
Nntp-Posting-Host: ashley.osc.edu
Organization: Viento Gigabit Testbed, Ohio Supercomputer Center
References: <1991Apr12.235346.28444@mp.cs.niu.edu>
Date: Sat, 13 Apr 1991 15:37:38 GMT
Lines: 26

rickert@mp.cs.niu.edu writes:
      You should have identified this as an IDA version of sendmail.  In the
      standard Berkeley versions RES_DNSRCH is not turned off.

Not true, Neil.  From raw sendmail-5.65/src/deliver.c:

deliver(e, firstto)
{
...lots 'n lots o' preparatory gunk...

#ifdef NAMED_BIND
	_res.options &= ~(RES_DEFNAMES | RES_DNSRCH);		/* XXX */
#endif

...assorted other delivery stuff...

#ifdef NAMED_BIND
	_res.options |= RES_DEFNAMES | RES_DNSRCH;	/* XXX */
#endif

...final delivery status checking...
}

Sure looks turned off to me...

--karl