sendmail: sender domain must resolve

[Kenneth Porter]

On Sat, 4 Nov 2000 15:48:31 +0800, Mathias K=94rber wrote:

>Does this happen to the client when it talks to smtp.kensingtonlabs.com=

>(ie the message never even makes in onto that server), or when smtp.ken=
singtonlabs.com
>tries sending it to another site?
>
>It might be helpful posting the error messages from the logfile etc
>(for one case only).

Here's the last one. The network number and hostname are for the
internal (LAN) client sending mail through sendmail on the gateway:

Nov  3 14:58:09 obi-wan sendmail[17625]: eA3Mus717625:
ruleset=3Dcheck_mail, arg1=3D<jeff_scott at kensingtonlabs.com>,
relay=3Danakin.kenlabs.com [192.9.200.192], reject=3D451 4.1.8
<jeff_scott at kensingtonlabs.com>... Sender domain must resolve
Nov  3 14:58:09 obi-wan sendmail[17625]: eA3Mus717625:
from=3D<jeff_scott at kensingtonlabs.com>, size=3D0, class=3D0, nrcpts=3D0,=

proto=3DESMTP, daemon=3DMTA, relay=3Danakin.kenlabs.com [192.9.200.192]

A message does get through at 15:06, and I see no further incidents
today. Do you suppose this could be congestion on our external
interface preventing queries from percolating to the outside? As this
domain is used constantly, I would think it would remain in the cache
and would rarely need refreshing from the zone master.

Ken
mailto:shiva at well.com
http://www.sewingwitch.com/ken/
http://www.harrybrowne2000.org/