RE: [Exim] refused relay

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Author: Philip Hazel
Date:  
To: Paul Walsh
CC: Marius Vincent, Exim-Users
Subject: RE: [Exim] refused relay
On Thu, 11 May 2000, Paul Walsh wrote:

> Not quite. The connection was from 196.7.177.58 claiming to be ecmss.org.za
> (denoted, I believe, by the fact the host name is in parentheses).
> If you try nslookup 196.7.177.58 you'll see that it fails. If, however, you
> lookup ecmss.org.za it yields the IP address 196.7.177.54
>
> > -----Original Message-----
> > From: Marius Vincent [mailto:mvincent@elcb.co.za]


> > 2000-05-09 14:11:42 refused relay (host) to <root@???> from
> > <pieterg@???
> > > H=(ecmss.org.za) [196.7.177.58] (failed to find host name
> > from IP address)


It means that a connection arrived from 196.7.177.58 and your
configuration is such that Exim needs to know what host name this
corresponds to. For example, you might have a setting such as

host_reject = *.some.thing

When it tried to find the host name by looking up the IP address, it
failed. So it couldn't find the name. So it doesn't know whether to
accept or reject. So, to be safe, it rejects. This is all in TFM
somewhere. It's also FAQ Q0029.

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.