How to setup a host as a sendmail relay for particular IP subnet

Posted by Abhinav on Server Fault See other posts from Server Fault or by Abhinav
Published on 2009-07-31T10:32:19Z Indexed on 2010/03/26 13:03 UTC
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sendmail

Hi,

By default, sendmail (I have version 8.13 on an RHEL4) allows only local mails.

I wanted to allow mails from a particular network to be relayed via the system, so I did the following based on suggestions from various places :

/etc/mail/access : Added the subnet and the domain 8.37 RELAY mydomain.com RELAY (I assume this is the originating email's domain)

This alone did not work, so I added the following to sendmail.mc FEATURE(access_db)dbl

Now, the problem is that it is allowing access from other domains as well. To test it out, I removed 8.37 RELAY from the access, and changed the email from field to [email protected]

However, I still receive the mail.

What is the correct way to configure this, so that only mails from a particular subnet are relayed ?

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