OT: DNS problems

Richard Potter rpotter at RPCS.NET
Sun Oct 16 19:40:50 IST 2005

On Fri, Oct 14, 2005 at 07:37:16PM +0100, Venkata Achanta wrote:

> named is running and responding but for some reason its not resolving that 
> barwol.com domain while the rest of the machines can.
> i changed /etc/resolv.conf to use to known good DNS servers and i am able 
> to resolve that domain now
> but still
> Oct 14 11:22:12 asav sendmail[23818]: j9EILqQj023818: ruleset=check_mail, 
> arg1=<dkatz at barwol.com>, relay=smtp.barwol.com [] (may be 
> forged), reject=451 4.1.8 Domain of sender address dkatz at barwol.com does 
> not resolve
> Oct 14 11:22:12 asav sendmail[23818]: j9EILqQj023818: 
> from=<dkatz at barwol.com>, size=1058, class=0, nrcpts=0, proto=ESMTP, 
> daemon=MTA, relay=smtp.barwol.com [] (may be forged)
> is something going on with sendmail then ?

Yes and No. This is almost always a DNS error that sendmail gets picky 

A quick check of the domain at http://www.dnsreport.com will probably 
lead you in the right direction.

Richard Potter

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