[Mimedefang] Mimedefang and greylist-milter

[Yanick Quirion]

Dear all,

Is there a way to install the greylist-milter on sendmail when sendmail
is already using mimedefang?

I want my server answer something similar to the following message on
the first connection to prevent SPAM:

Deferred: 451 4.7.1 Greylisting in action, please come back

Can somebody can help me how to do it?

Regards,
Yanick Quirion