Hi. I need to limit the maximum number of outgoing SMTP connections done by Postfix for delivering messages. Our VPS provider is limiting to 5 conns/s, so I need Postfix not to open more than 5 connections to remote SMTP servers.
I cannot use config param *destination_concurrency_limit because they’re related to a single recipient domain. So I was pointed to master.cf, where I could limit the maximum number of “smtp” processes. So I changed the smtp (or what I think it is) line as follows: smtp unix - - y - 5 smtp Is this the correct approach? I’m asking because it didn’t fully work. I delivered a newsletter today and I still got blocked by ISP. Thanks maxxer
