System Administration Guide: Network Services Configuration File From Version 8.12 of sendmail

Starting with version 8.12, sendmail includes an additional configuration file, /etc/mail/ This file,, is used to run sendmail in mail-submission program mode instead of daemon mode. Mail-submission program mode, unlike daemon mode, does not require root privilege, so this new paradigm provides better security.

See the following list of functions for

Note the following:

Functions That Distinguish From

The configuration file is for the daemon mode. When using this file, sendmail is acting as a mail transfer agent (MTA), which is started by root.

/usr/lib/sendmail -L sm-mta -bd -q1h

See the following list of other distinguishing functions for

Functional Changes From Version 8.12 of sendmail

With the addition of, the following functional changes have occurred: