[olug] Senmail relaying

[tmelcher]

On 02 Apr 2004 15:57:27 -0600, Ryan O'Rourke wrote
> Well, maybe I should explain myself more clearly. Looking back on my
> original message I see it's somewhat vague.
> I administer a Sendmail-8.12.8 box running RH9. Someone else administers
> an Exchange server (our main office email server), and a Lotus Domino
> server (mail for a different, internal, non-routeable domain).
> 
> For most users their mail is handled like this:
> Mail to *@maindomain.com is handled by Exchange.
> Mail to *@otherdomain.com is relayed from Exchange to Domino and is
> delivered.
> 
> However, Linux desktop users prefer to use sendmail for SMTP and
> therefore haven't been able to send mail to otherdomain.com
> 
> I need to get Sendmail set up so it will just dump email addressed to
> otherdomain.com directly to Domino.
> 
> I tried what you suggested below by adding an MX record for
> otherdomain.com to /var/named/db.maindomain.com. The MX records now look
> like so:
> 	MX 10 exchange.maindomain.com.
> 	otherdomain.com MX 10 domino.maindomain.com.
Is this name server Internal???

If so create a new db.otherdomain.com file, the outside world doesnt care if
this domain doesnt exist in reality.
Your new file should look almost identical to your db.maindomain.com file
except for the different domain name, and you dont need all the extra A and MX
records in there 

add  MX:
                 MX 10 domino.otherdomain.com.

Also add an Address (A) record and point to the real IP of domino

domino         IN        A       192.168.1.2   (you might have a TTL in here too)

> 
> I also created the file /etc/mail/relay-domains:
> 	.otherdomain.com         RELAY

This should just be otherdomain.com

HTH 
Trent


> 
> Finally I restarted Sendmail and tested. The delivery of a message from
> mydesktop.maindomain.com to someone at otherdomain.com failed.
> 
> hrmmm... I'm sure someone's got something completely fubar here so 
> any suggestions would help! Thanks again.
> 
> -- Ryan
> 
> On Fri, 2004-04-02 at 13:59, Trent Melcher wrote:
> > What you can do is, first I assume you have an MX record out there that
> > points somedomain.com to your current mailserver.  You should have an
> > internal name server that you mailserver does his lookups on and  this one
> > will have an MX record for somedomain.com that actually points to the
> > mailserver you want to relay it too.  You will also need to add
> > somedomain.com to the /etc/mail/relay-domains file of the relaying
> > mailserver.
> > 
> > If you need more detail, or if I havent explained it clear enough let me
> > know.  I use this setup, I have 10 domains inside my firewall,  I have a
> > central mailserver that all email for all 10 domains go to first to get
> > scanned for SPAM/viruses,  then this mailserver relays the mail based on the
> > domain to the correct mailserver.
> > 
> > Trent
> > 
> > -----Original Message-----
> > From: olug-bounces at olug.org [mailto:olug-bounces at olug.org]On Behalf Of
> > Ryan O'Rourke
> > Sent: Friday, April 02, 2004 11:44 AM
> > To: olug at olug.org
> > Subject: [olug] Senmail relaying
> > 
> > 
> > I'm very new to Sendmail and am trying to configure it so any email sent
> > to it with a *@somedomain.com address will automatically be forwarded
> > onto a different server for processing.
> > Can anyone help to point me in the right direction?
> 
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