Many Sendmail do not support the mailertable mechanism. This is a compile
time option and few linux's distribution have chosen not to include this
feature. In the "basic information"
screen, there is a check box
to enable support for it (special routing database). If you enter
some routing in the table, Linuxconf will warn you if the feature has
not been selected. Once you have selected the feature (check-box), you
must regenerate the sendmail.cf
file.
If your Sendmail fail to start after that, check the error logs
in /var/log
. Your Sendmail may be configured to not supported
the mailertable concept.