proposed solution for spam sent to majordomo@yourdomain

Bill,
I have been trouble by the exact same issues. Great appreciation would 
come your way if you could provide me with your code.
John Harris
Denver, Colorado

 >Recently, I've been seeing a fair number of spam messages that have 
been sent to my majordomo address. They are sent from bogus "From:" 
addresses, and since >majordomo doesn't need Viagra, etc, "he" replies 
with a long stream of error messages: &squawk("Command '$cmd' not 
recognized."); This message with every line >parroted back as "not 
recognized" PLUS the majordomo help text is then sent to the fake 
"From:" address, and the isp, if it exists, sends it BACK to me 
complaining about >a non-existant user. As majordomo-owner, I get it in 
my inbox. To put a stop to this, I modified majordomo in the following 
ways: I added a threshold of 10 "not >recognized" errors, which if 
exceeded AND we have NOT SEEN ANY valid commands, the following actions 
take place: 1. Processing of the message is terminated. 2. >The help 
text is not sent. 3. Instead of replying to the "sender", we send just 
send a short note to majordomo-owner that says a message with > 
THRESHOLD errors was >found and a reply was NOT sent to "sender". I'll 
be happy to make this code available in any way that is appropriate. 
Bill Dudley