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Thanks for the response. It seems I had the wrong understanding of how much of the communication needs to be completed before the connection is rejected. If appears each connection will initiate an smtp process in order to be rejected. After investigation it seems adding fail2ban to the config...

Well I think I have done everything right. I copied and then edited the main.cf.in template by adding the following line (after the other smtpd_client_* lines) smtpd_client_restrictions = check_client_access cidr:/etc/postfix/client_checks Created the /etc/postfix/client_checks file...

Hi, I've just installed Proxmox Mail Gateway and have a simple noob question. I get a lot of access attempts from Bangalore addresses which I'd like to filter. Hmail used to do a good job blocking IPs automatically. I've setup a who object network blacklist for the ranges to block. My...