Unable to find sendmail.mc

[Charles Lamb]

Well after a lot of RingTFM on amavis I found out I should be using
amavisd.  Anyway all of the readme files keep telling me I need to add
code to sendmail.mc and run m4 on it to create sendmail.cf.  Well I
cannot seem to find sendmail.mc anywhere.  I found a file called
freebsd.mc but when I turn that into sendmail.cf sendmail gets real
angry.  Any ideas?