Can You insert an option to check the blacklists
of SpamCop, OpenDB, etc... ? So You have the
option to deny listed servers and to reply with
'You are blacklisted by...'
Logged In: YES
Nope, sorry, this is out of bogofilter's scope, and if we implemented that, it would come way too late. This belongs into the SMTP server instead, which can reject the mail much earlier.