spam being sent through list-digest-outgoing

[zuess007 @ zoso . net]

I will call my mailing list "list" in hopes to finding a solution to my 
problem. What is happening is spammers have found a way to send spam 
directly to the digesters by using "list-digest-outgoing" This spam does 
not generate with the digest nor does it archive. But it finds its way to 
all the people in digest mode. I do have root access to this machine as 
well as the mail aliases, but I am clueless on how to stop this without 
stopping the digest. Any and all help would be so much appreciated. I am 
also willing to send a copy of my majordomo aliases if this would help.

Please Please! I need help

Thanks in advance

Bob
zuess007 @
zoso .
net