We will put all of sendmail's configuration files in a
separate directory under /etc:
/etc/mail. Usually, sendmail will expect
these files to reside directly under /etc. To
avoid problems, /etc/sendmail.cf should be a
symbolic link to /etc/mail/sendmail.cf.
The following files will populate /etc/mail:
=20
aliases - contains additional local addresses
genericsdomain - contains some information on your
local host's configuration
genericstable - contains the actual rewriting
rules.
sendmail.cf - sendmail's configuration file
sendmail.mc - the source of sendmail.cf.
Some of these files will be accompanied by .db files.
They contain hashed databases for sendmail's direct use.
We assume that the cf part of sendmail's source
tree resides under a directory named
/usr/lib/sendmail.cf. This is the case
on Debian GNU/Linux systems. Other distributions will put
this stuff at different places. Please refer to your
distribution's documentation for details.