[Mimedefang] cpanel whm centos 6.9 flag on header keywords?

[Chip]

Newbie excited to use the features of mimedefang for a new project that
needs to flag inbound email for sorting into folders  (this can be done
via cpanel-level filtering) based on keywords in headers.

This is a Centos 6.9 machine running cpanel/WHM 11.68.0.23.

Running "rpm -q sendmail postfix exim" show sendmail is not installed
yet there is a sendmail binary in /usr/sbin/sendmail.  No sendmail.mc
anywhere in system.  SpamAssassin version 3.4.1 running on Perl version
5.10.1.

Exim version 4.89_1

Very broad question here: given the above information can this be done
on this machine with the existing software?