Date: Wed, 19 Jun 2002 09:43:21 -0600 From: "Samuel Chow" <cyschow@shaw.ca> To: "Andrew" <perl@ukrpost.net> Cc: <freebsd-questions@FreeBSD.ORG> Subject: Re: Mail Message-ID: <00a101c217a8$0ba06200$2784412f@ca.nortel.com> References: <13239307310.20020619150831@ukrpost.net>
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Hi there,
> >> I cannot send message to one host. My smtp server is running
> >> qmail. I see in logs "451 unresolvable relay host name check your
> >> setup".
> >
> > well, your smtp server's name doesn't resolve, probably.
>
> It does. The only thing is that my smtp hostname is
> mail.mydomain.com while users set their From to @mydomain.com.
>
> Could this be a problem? I have no way to setup up DNS record
> mydomain.com to smtp's IP.
There isn't a whole lot of details, so I am just guessing here.
I think the problem was the remote SMTP server was doing a DNS
lookup on the hostname your qmail passed along. That hostname,
unfortunately, did not resolve. Therefore, the remote SMTP
server refused to accept mail from you.
If this is indeed the problem, put a resolvable hostname into
the 'helohost' configure file, and restart qmail.
---
Samuel Chow
cyschow@shaw.ca
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