[NTLUG:Discuss] Secondary Mail Server

[thomas.cameron@camerontech.com]

I am assuming sendmail here.

What you do on the secondary is tell it it is allowed to relay for the
domain via /etc/access:

acmewidgetcorporation.com    RELAY

Do *not* add the domain name (acmewidgetcorporation.com in my example) to
local-host-names on the secondary MX server.

What this does is tells the secondary to realy to the primary.  It will
keep trying for 5 days, so you have 5 days to get the primary back up. 
You should *not* have user accounts on the relay server - they are not
needed.  You need not configure anything nearly as complicated as
virtusertable.

That's it - you have a relay server.

Thomas Cameron, RHCE, CNE, MCSE, MCT
Cameron Technical Services, Inc.
http://www.camerontech.com


> I recently got a second box to use as a secondary mail server for one of
>  my domains, and have a question as to the setup.  Recently, my primary
> server went down, and the secondary box did it's job and caught all the
> mail, but it didn't forward to the primary box when it came back up.
>
> 1)  What needs to be configured to make this happen automagically in
> sendmail?  I have a feeling I borked an entry in my local-host-names
> file, but I'm not sure.
>
> 2) I have created the virtualuser table with local users on the
> secondary box mapped to the users on the first box in this fashion:
>
> localuser1	localuser1 at primary.mailserver.com
>
> Is the above the way that should be handled?
>
> TIA-
> Ry
>
>
>
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