Configuring sendmail to listen on all interfaces

Configuring sendmail to listen on all interfaces

How to make sendmail listen on all interfaces on the server

 

1. Lunch a terminal and edit mail file located in /etc/sysconfig directory with the following command

    vi /etc/sysconfig/mail 

2. Look for line that start with SMTP_LISTEN_REMOTE="no"

    set this to "yes"

3. Restart the sendmail service by typing the following command on the terminal

    /etc/init.d/sendmail restart    or   rcsendmail restart

By default, sendmail only listens on localhost and only mail from localhost are accepted. Sendmail needs to be configured to listen on all interfaces in order receive mails from internet.