I dont know if this helps but I was doing some work on sendmail config files last night and there is a feature:
FEATURE(`blacklist_recipents')
that is set up for this purpose in the m4 config file. I have not had the need to use it yet, but you can find information on it @ http://www.sendmail.org/m4/features.html. Then click on the Anti-spam configuration control page for info on how to set up the database. I think this will allow your ISP to block the spam at the server.
Slashdot Mirror
I dont know if this helps but I was doing some work on sendmail config files last night and there is a feature:
FEATURE(`blacklist_recipents')
that is set up for this purpose in the m4 config file. I have not had the need to use it yet, but you can find information on it @ http://www.sendmail.org/m4/features.html. Then click on the Anti-spam configuration control page for info on how to set up the database. I think this will allow your ISP to block the spam at the server.
Hope this helps,
NoKill