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I know I can setup filtering, but this does nothing to stop of flow of spam through the mail server even though it does keep it out of the inbox. I am looking for something more aggressive. Is there any way to setup smartermail to detect on the HELLO the user's sending toplevel domain, and then blocking based on it. Maybe even implimenting a 24 hour block by the IP, or IP block for any IP that sends email on their behalf. I have already setup something like this outside of smartermail with a chron job that reads the SMTP logs, and firewalls IPs automatically, but I was hoping to do something similar within smartermail without having to use my firewall.