<html>I am currently working on a setup using nginx mail module with several backends. Due to port exhaustion, I would like to do splitting of outgoing connections across several IPs. For http this is well documented, but for the mail module I could not find anything. Simply trying "proxy_bind" in the mail{}-config does not yield any success, because it is forbidden in this context.<br /><br />How would you tackle port exhaustion with many long-running IMAP connections?<br /><br />Best regards</html>