[exim] (no subject)

I have a router set up to log bsmtp files of messages passing through
my server. There are certain messages I wish to pass unrecorded.
Specifically list messages from mailman, which get archived by the
list software.

What would be the best way to accomplish this?

I see two options: the Sender header, which will be
'listname-bounces@???', or the Precedence header which will
always be 'list'.

Something like this, perhaps?

mail_tap:
driver = accept
senders = !operations-bounces@???
domains = mydomain.com
transport = smtp_tap
unseen