• How to reject spam from certain countries (if you must really, really do it)?

    Every now and then, a question like this pops up on some email server management forum: I'd like to be able to reject connections from remote IP addresses if they're from certain countries. The usual reason is either thatthe sender only receives spam from those countries and is convinced that this will always be the case, or that, since the sender doesn’t need or want to exchange email with anybody in those countries, why bother at all with filtering messages from there?