Using Exim as a controlled relayer

[Tim]

Allegedly, on or about 26 March 2013, Gary Stainburn sent:
> When I test this using 
> 
> exim -bt user at hosted.domain
> 
> it works fine, but when I try to send an email it fails 
> 
> relay not permitted.
> 
> Obviously i do not want to turn on relaying, so how can I configure
> Exim to allow emails that have matched a record in the user table to
> be forwarded? 

Bearing in mind your bowlderised example, my simplistic answer would be
to use real domain names (that you own) in your network.  Things work a
lot easier when you don't use fake domain names.  Being able to email
between machines, for just one example.

-- 
[tim at localhost ~]$ uname -rsvp
Linux 3.8.3-103.fc17.x86_64 #1 SMP Mon Mar 18 15:46:01 UTC 2013 x86_64

All mail to my mailbox is automatically deleted, there is no point
trying to privately email me, I will only read messages posted to the
public lists.

My apologies for not including a virus with this message, but I don't
use Windows.