sendmail Configuration (cont)

• sendmail reads /etc/mail/sendmail.cf (demo)

• humans maintain /etc/mail/sendmail.mc

• use m4 to generate sendmail.cf from sendmail.mc:

  • m4 /usr/local/share/sendmail/cf/m4/cf.m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf