Vicky’s server guides

The file to rebuild is located in /usr/lib/opcenter/sendmail/install/sendmail.mc

Make sure you do backups first:

cp /usr/lib/opcenter/sendmail/install/sendmail.mc /usr/lib/opcenter/sendmail/install/sendmail.mc.bak

After editing the file /usr/lib/opcenter/sendmail/install/sendmail.mc you need to rebuild it to macro format which will be located in /etc/mail/sendmail.cf

m4 /usr/lib/opcenter/sendmail/install/sendmail.mc > /etc/mail/sendmail.cf

voila! it is done, now restart sendmail by “service sendmail restart” and your changes are applied.