Thank you Viktor, Your example with the "RSET" command made me realize what I was seeing in my Postfix logs from my tests.
Example : Aug 2 11:59:22 mta4 postfix/smtpd[31444]: lost connection after RSET from z.z.z.z Thank you Jeroen, That's the answer I was looking for, an example where leaving one setting "off" can allow spammers to spam. I think in my testing I tested multiple ways of sending without even knowing it. 1. sending many emails over one smtp connection 2. sending many emails over multiple smtp connections Thank you to everyone that took the time to respond. I think I'm all set now. -ALF -Angelo Fazzina Operating Systems Programmer / Analyst University of Connecticut, UITS, SSG-Linux/ M&C 860-486-9075 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Viktor Dukhovni Sent: Tuesday, August 2, 2016 1:58 PM To: [email protected] Subject: Re: Question about Anvil On Tue, Aug 02, 2016 at 05:50:23PM +0000, Fazzina, Angelo wrote: > My question is what would be a good explanation for having BOTH > smtpd_client_message_rate_limit and smtpd_client_connection_rate_limit > Set at the same time? SMTP allows the transmission of more than one message per connection. EHLO example.com MAIL FROM:<[email protected]> RCPT TO:<[email protected]> DATA <message1 headers and body> . RSET MAIL FROM:<[email protected]> RCPT TO:<[email protected]> DATA <message2 headers and body> . RSET MAIL FROM:<[email protected]> RCPT TO:<[email protected]> DATA <message3 headers and body> . RSET ... -- Viktor.
