procmail as a content_filter with dovecot

Vicki Brown vlb at
Tue Nov 10 05:35:12 UTC 2015

I am using Mac OS X Server. OS X Server uses postfix with dovecot set as mail_transport.

I want to add procmail to the mix. I cannot use the (typical)
    mailbox_command = procmail -a "$EXTENSION"

    mailbox_transport = dovecot

overrides any mailbox_command parameter and it is NOT Possible to change, remove, or otherwise vary the
mailbox_transport on OS X server.

I'm thinking I should be able to set up a content_filter for procmail, but I've found nothing online to tell me if this is possible or how to declare it.

Can anyone help?

-- Vicki

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