What you need is either
relay_domains = object.com
or
relay_domains_include_local_mx
Either setting will tell exim that it is allowed to accept mail to relay to
any mailserver for object.com. Using "relay_hosts" would allow his host to
relay through you, which is totally different.
Note that you might also want to set up some different retry rules for this
domain so that mail can sit in the queue longer if his mail server is down
for an extended period of time.
----- Original Message -----
From: Chad Leigh, Pengar Enterprises, Inc. and Shire.Net LLC
<chad@???>
To: <exim-users@???>
Sent: Wednesday, June 16, 1999 8:56 AM
Subject: [EXIM] serving as a backup MX host
>
> Hi All
>
> I currently have [cut from an actual header] (Exim 2.04 #4) running. I
> have a custoemr who runs his own mail server over ISDN and is not always
> connected. He would like me to be set up as a backup MX host.
>
> The MX records for his domain read
>
> object.com MX preference = 20, mail exchanger = hobbiton.shire.net
> object.com MX preference = 10, mail exchanger = lissie.object.com
>
> With his being the 10 and mine the 20.
>
> I have
>
> relay_hosts = object.com
>
> in my exim.conf. I set this up and sent him a message to test it. His
> link was down. Immediately my message bounced (sent through my SMTP
server
> which is also his backup). The bounce message said:
>
> A message that you sent could not be delivered to all of its recipients.
The
> following address(es) failed:
>
> eb@???:
> retry time not reached for any host after a long failure period
>
>
> So I went in and deleted the retry record in the retry database for
> object.com and tried again. This time it sat in my mail queue until the
> retries timed out according to the retry rules. (Since changed to be
> 100days). Then any mail sent to him bounced back with the above message
if
> he was down. I want it to not do that. But I understand why it happened.
> But the kicker comes that today while he was UP I sent a test message to
> him that bounced as above and he was up. When does the retry get reset
> automatically, if ever, and what other settings do I need to set up to act
> as a reliable backup MX host? I am not sure I really want it to retry for
> 100 days but I for now I set that until I figure out the best value.
>
> Thanks
> Chad
>
>
>
> Pengar Enterprises, Inc. and Shire.Net LLC
> Web and Macintosh Consulting -- full service web hosting
> Chad Leigh
> chad@??? chad@???
>
>
> --
> *** Exim information can be found at http://www.exim.org/ ***
>
>
--
*** Exim information can be found at
http://www.exim.org/ ***
