[Mimedefang] spamtrap question

[NFN Smith]

I'm running MIMEDefang 2.57 with Sendmail 8.13.8 on a Debian server, and 
trying to improve my spamtrapping methodology, a bit.


In my current setups, when my server receives a mail delivery attempt, I 
have things set to do an LDAP query, and for addresses that fail the 
query, we reject the message.

I also watch my logs, and track invalid addresses that continually 
receive mail.  For the addresses that are hit frequently and 
consistently, I convert those to spamtraps, adjusting the sendmail 
virtusertable to redirect mail into a mailbox that I read.

The place where I have difficulty is with addresses with former users 
that are now no longer valid.  If a user leaves, I generally leave 
things set for at least 6 months, where inbound mail to that address is 
rejected, to allow for legitimate senders to get the idea that the 
address is no longer accepting mail.

The problem is that with this methodology, if I'm accepting messages, 
then senders aren't getting rejection messages (and some senders are 
just as persistent over time, as the spammers).

Thus, what I want to do is adjust things so that when a message is sent 
to an address that I'm trapping for, the sender gets the standard NDR 
from an SMTP 554 error, but that the spamtrap still gets a copy of the 
of the message content (as I'm currently doing with the virtusertable).

Is there a way to do this in MIMEDefang?

Smith