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

I'm new here. Wanted to extend RB_CWI answer, but I am not allowed to comment. His solution worked great.

You are not required to define the DOMAIN().

However, on my system I was required to install the sendmail-cf package.

The instructions below were done on CentOS 6.5

First, install sendmail-cf

sudo yum install sendmail-cf

Then, edit the senmail.mc

sudo vi /etc/mail/sendmail.mc

At the bottom of the file add FEATURE(relay_entire_domain)dnl, so it looks like:

...
FEATURE(relay_entire_domain)dnl
MAILER(smtp)dnl        # right above this line
MAILER(procmail)dnl
dnl MAILER(cyrusv2)dnl

Save the file, and restart sendmail.

sudo service sendmail restart