Help with deleting AOL bounces via procmail

I have a lot of mail that I forward (for someone else) that turns out to
be spam; the forwarding address is at AOL, which bounces it back to me.

I have a filter in my mail client, so it's somewhat under control.
However, I would like to start just deleting it all at the server to
improve the situation. (I realize the solution may delete legitimate
bounces - a price I'm willing to pay.)

I already had a procmail command (in the .procmailrc file) to delete
regular SPAM messages, so I tried modifying it to make it work for my
purpose. Here are the commands:

## delete on server
:0:
* ^X-Spam-Status: Yes
/dev/null

(this is working great for that purpose)

And my modified command to delete bounces:

## delete X-ASK mailer-daemon bounces:
:0:
* ^X-ASK-Info: Message from Mailer-Daemon
/dev/null

The "X-ASK-Info" line is from the headers of a bounced message. But this
isn't working.

Can anyone suggest the correct syntax? My hosting company, which will go
un-named to protect the guilty, hasn't been able to help.

--
Jedd Haas - Artist - New Orleans, LA
http://www.gallerytungsten.com
http://www.epsno.com