[Dovecot] sieve plugin - reject sends MDN. Can it 550 reject ?

I'm using dovecot-1.2-sieve-0.1.15 with dovecot-1.2.11.

I have a reject test filter that looks like this:

require "reject"; if header :contains "subject" "reject" { reject "bye"; }

Is there any way to get a "reject" filter to send back a 550 reject as detailed in http://ietfreport.isoc.org/idref/rfc5429/#section-2.5 rather than a MDN?

The MDN can result in blowback spam. :-(

Thanks, Ken

-- Ken Anderson Pacific Internet - http://www.pacific.net