sendmail and MX records when mail server is not on web host

Question

This is a problem I\'m sure is easy to fix, but I\'ve been banging my head on it all day.

I\'m developing a new web site for a client. The web site resides at (this

Answer 1

Sendmail by default guesses list of local email domains. It can be turned off using the following line in your sendmail.mc file:

define(`confDONT_PROBE_INTERFACES',`True')

As root list local email domains before and after the change using:

echo '$=w' | sendmail -Am -bt

You will see which domains should be added "manually" to (usually) /etc/mail/local-host-names file after disabling auto-guessing.

After changing sendmail.mc:

1. Generate/compile new sendmail.cf file
2. Restart sendmail daemon (or send HUP signal)