I am using Postfix as personal mailserver, with very light traffic. I do, however, get a lot of open-relay attacks. Often, these attacks come in bursts, tens of attacks within couple of seconds, from the same IP.
Would this situation be a good use of "rate_limits" ? Any suggestion how I should fine-tune the limits ? Would the following settings make sense ? anvil_rate_time_unit = 60s smtpd_client_connection_rate_limit = 10 smtpd_client_message_rate_limit = 10 smtpd_client_new_tls_session_rate_limit = 10 smtpd_client_recipient_rate_limit = 10 Can somebody with more experience advise, please? thanks Thomas
