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Tag Archives: relay

Blocking relay hammering on Postfix with Fail2ban

Written on October 14, 2016 at 12:47, by

After installing Postfix on a new VPS I noticed that server was under continuous attack by people trying to use it as an open relay. The server obviously was configured not to allow relaying for external parties so they were politely shown the door by Postfix: However since there were a lot of them (sometimes […]