:-)I mean protecting from the situation that one user's password has been compromised and it results in a lot of spam in being sent by our server (human's reaction takes a few minutes and it my be too much, I'm afraid).
I've found several useful settings in http://www.postfix.org/postconf.5.html by I'd appreciate some clarification.
1. I'm wondering if there are some recommendations, good practices etc for it or some rules like 'if you set this limit to X, then you should set the other one to X+1, 2*X or sth like this)?
2. smtpd_client_recipient_rate_limit seems sexy but I'm not sure if this limit works independently of the number or mails being sent (for example when set to 50: will it work for both 1 mail to 50 recipients or 50 mails to 1 recipient)?
3. smtpd_client_connection_rate_limit and smtpd_client_message_rate_limit : may I ask for some recommendations what aspect ratio for those two values would be best for limiting abuse? Should I use those or rather smtpd_client_recipient_rate_limit ?
4. smtpd_recipient_limit : how about the situation that a single local recipient address resolves via aliases and virtuals to a great number of delivery addresses?
5. I'm unsure what smtpd_recipient_overshoot_limit does. Thanks for some explanation.
Thanks a lot! Best regards, Marek
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