Hi everyone, I'm running a Postfix server and have encountered an issue where some SMTP clients (usually Amazon servers) keep their connections open even after successfully sending a message. Over time, this behavior causes all available smtpd connection slots (e.g., 100 concurrent connections) to be consumed, preventing new connections from being accepted. I would like to configure Postfix to forcefully close the client connection after some idle time after the message is received and accepted, to avoid idle or persistent SMTP sessions. I have tried setting smtpd_timeout = 60s but this only controls per-command timeouts, and it doesn't ensure disconnection after some idle time. I also tried looking for a setting like smtpd_connection_idle_timeout, but I found that this parameter doesn't exist in Postfix. Is there a way to tell Postfix to close the connection after some idle time?Are there any Postfix-native parameters or best practices for avoiding excessive connection persistence? Ia have reviewed carefully thr stress=yes param, but it does not do what i need... Thanks in advance!
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