If you are going to use Postfix to send mail only, there is no
need to change your existing sendmail setup. Instead, set up your
mail user agent so that it calls the Postfix sendmail program
Follow the instructions in the "
configuration file edits" in section 10, and review the "To chroot or not to chroot" text in section
You MUST comment out the "smtp inet" entry in /etc/postfix/
in order to avoid conflicts with the real sendmail. Put a "#"
character in front of the line that defines the smtpd service:
#smtp inet n - n - - smtpd
Start the Postfix system:
# postfix start
or, if you feel nostalgic, use the Postfix sendmail command:
# sendmail -bd -qwhatever
and watch your maillog file for any error messages. The pathname
is /var/log/maillog, /var/log/mail, /var/log/syslog, or something
else. Typically, the pathname is defined in the /etc/syslog.conf
% egrep '(reject|warning|error|fatal|panic):' /some/log/file
Note: the most important error message is logged first. Later
messages are not as useful.
In order to inspect the mail queue, use one of the following
% sendmail -bp
% postqueue -p
See also the "
Care and feeding" section 12