Hi there,
I also think it is the tcpserver switch used. I had to set mine from -
H (which will keep qmail-smtp from doing reverse lookup) to -h (which
is the default and does allow for lookups).
Mark that I also use a caching DNS server (tinydns), which is a good
thing to have in this case as you might end up with an unresponsive
system otherwise.
Thanks,
Martin
Am 30.12.2008 um 02:09 schrieb Tren Blackburn:
What switches are you using to call tcpserver with for your qmail-
smtpd process?
t
----- Original Message -----
From: Jeff Koch <jeffk...@intersessions.com>
To: toaster@shupp.org <toaster@shupp.org>
Sent: Mon Dec 29 23:05:30 2008
Subject: Re: [toaster] Why - Received: from unknown
The receiving mailserver can do reverse DNS perfectly - just doesn't
seem
to want to do it during qmail smtp connections. I checked the
/etc/nsswitch.conf file and changed it from:
hosts: files mdns4_minimal [NOTFOUND=return] dns
to:
hosts: dns files
That didn't seem to help either. Do you think a reboot or a service
restart
is necessary after making this change?
At 11:49 PM 12/29/2008, you wrote:
>Jeff Koch wrote:
>>Hi:
>>Does anyone happen to know why all emails received by qmail are
reported
>>as 'Received: from unknown' even though the sending mailserver
clearly
>>identifies itself and has reverve DNS setup?
>>Here's a good example from an email I just recieved:
>>Received: from unknown (HELO lists.sourceforge.net) (216.34.181.88)
>
>That suggests the reverse dns lookups are failing on that server.
Have you
>tried some lookups manually to see if they are working? I had an
issue
>similar to this just recently with a new server and it took a while
to
>realise that I had made a mistake in the nssswitch.conf file and it
was
>trying to resolve everything via ldap instead of via dns.
>
>Shane
Best Regards,
Jeff Koch, Intersessions
