MailScanner on Red Hat 8.0 w/Exch (USER Unknown problem)

Steve Hickel smhickel at CHARTERMI.NET
Wed Apr 23 20:57:00 IST 2003


What we have is the exchange box with users on there. No users other
than the normal users you get when you config a linux box exist on
linux. When I sent an email from outside the network and domain to the
local domain known to the internet as the our domain I can see the

from steve at proto esmtp daemon=mta relay=ip number of my
router at the sent-from site 
The next line says to the email on my local server had its connection
reset by the exchange server at the w2K domain exchange box.

On my remote email the rejection message says:

the email address could not be found, check the address again.
localhost.localdomain #5.1.2.

I had entries in the local-hostnames and removed them. I add the
mailertable entry you suggested. 


ps. I still have the dns 10 and 10 pref's set up as well.

On Wed, 2003-04-23 at 15:18, Raymond Dijkxhoorn wrote:
> Hi!
> > was originally getting the port 25 traffic). When I do that my maillog
> > in /var/log/mailllog says that my email users are unknow users and it
> > appears not to deliver email to the exchange box through the linux
> > sendmail/mailscanner box that has been part of the earlier discussion.
> Its asuming its local users, you could do this in a different way. Put in
> a entry in the mailertable. (/etc/mail/mailertable)
> Like this:
>                          smtp:[]
> If you put in your domain, and the hostname of your exchange box it should
> go a little better i think. The linux box forwards all mail for the
> mentioned domain to mail.<something>
> > thing is supposed to take care of the forwarding automatically.I need to
> > resolve why the mailscanner box isn't forwarding email to the exchange
> > box when it comes in (I can see that it is getting the mail in the mail
> > log, it just says unknown user). I currently turned off named and am
> > relying on the dns entry on the machine to point to the W2K DNS server
> Thats depending on some other settings. Did you accidently add for
> example the domain you relay for in the /etc/mail/local-hostnames ?
> Bye,
> Raymond.
Steve Hickel <smhickel at>
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