how to relay only company domain mail to a specific server?

[coolsti1954]

I have used sendmail often, but never had to configure it so I know very little about doing so.

Here is the problem: My Linux PC's are connected to our company main Windows 2003 server, srv01.mycompany.com. Recently we set up a new Exchange server to handle our emails, srv07.mycompany.com. After this was done, I could still send emails out with sendmail to external email addresses, but I no longer can send emails to people within the company.

When I look at the maillog entries, I see that emails to company employees has "relay=srv01.mycompany.com". The mails are being sent to the main company server, and most likely being dropped there instead of being passed on to the Exchange server.

I tried to force use of srv07 instead of srv01 by adding the line

define('SMART_HOST',`srv07.mycompany.com')dnl

to sendmail.mc, reconfiguring and restarting sendmail. Doing this, I can send mail to company employees, but no longer can send mail to external addresses (they also get relayed to srv07 and then bounced back saying I do not have permission, which is certainly an anti-spam protection).

So my question: How can I set up sendmail to relay to srv07 only the mail that is addressed to *.mycompany.com? I think this is what I need to do here.

Thanks for any help!

 

[elgrandeperro]

I would enable mailtable. That is the way to subvert DNS and get the mail routing the way you like. The mycompany.com would have an entry that points to srv07.mycompany.com.

 

[coolsti1954]

Hi and thanks for the tip!

I found out after reading a bit on the sendmail site that mailing tables is what I needed. These were already enabled, but empty, and I just needed to make the one entry for my company, create the database file, remove the "SMART" entry and restart the daemon and it works as I want now.

Thanks again!

- Steve, Denmark