I've been using blaklists (spamhaus, spamcop, etc...)for a while to block messages from spammers. Lately, whenever I am running my server using these dnsbl with sendmail, I am automatically get subscribed to spamhaus and other blacklists. This makes me think that spammers are finding a way to automatically subscribed to these blacklists and forcing me to remove it from my sendmail.cf so we can start sending out our emails.
I am looking for a way to make these "rejected" messages to go to /dev/null but I haven't been able to mess with sendmail.cf to get it to work.
Frustrated...
