How to check incoming DKIM sigh and delete BAD?

[shark_tracepoin]

I found something like this:

deny set acl_m1 = ${lookup dkim{${lc:${domain:$h_from:}}}}
add_header = X-Exim-DKIM-Status: ${lookup dkim{${lc:${domain:$h_from:}}}}
condition = ${if eq{$acl_m1}{bad}}
message = Bad DKIM signature

but I always get:
X-Exim-DKIM-Status: unverified

[scsi]

Dkim is not officially supported ... sorry.

[nobaloney]

And do we only offer official support on this forum?

Support for dkim on exim can be found at the official exim wiki (http://wiki.exim.org/DKIM).

Jeff