I've been seeing a large increase in spam email from .pw and would like to block all email coming from that country. We are currently using Postfix, Spamassain, Clamav, and have been adding domains to the deny list in spamassain. I tried using *.pw to block all in Spamassasin but the list is becoming too large. I found online reference to add a line to the access file to REJECT, but that file does not exist on my system. Do you have a recommendation?
Best way to block email from specific country