From: Bret Lewis Sherman [mailto:[EMAIL PROTECTED]
> 
> Relaying is usually disabled by default, being that it is a bad
> thing to be a mail relay. The best way, as far as i understand it,
> is to use packages like SASL, and then allow logged in users to send
> eternal mail. 

Relaying for logged in users is enabled by default in Courier with ESMTP
authentication.

> On Fri, 7 Mar 2003, Dave Duncan wrote:
> > 
> > Hello, I am using the Courier MTA with its associated Esmtp and
> > POP3 modules. My users can send mail internally fine, but all
> > external mail is deffered with an error "no route to host". If I
> > run the testmxlookup scritp is will find the MX records needed for
> > delivery, but the messages stay que'ed. I have reviewed all teh
> > cfg files and associated man pages, is there something I am
> > missing, any help is greatly appreciated. Thanks.

If the error is "no route to host", it doesn't sound like a relaying issue.
It sounds like an IP routing problem.  Your system doesn't know how to get
to the MX.

Check the contents of esmtproutes to see if you are sending the mail
somewhere besides the MX for the domain.
See if you can ping the MX.

Bowie


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