Marius Gologan: > I'm running a stress test against Postfix, running smtp-source command with > 1.000 parallel connections from one source IP. > When postscreen is active, at about 400-460 connections I get "421 4.3.2 All > server ports are busy".
Please do not blame the messenger of the bad news.
POSTSCREEN tries to hand off of connections to SMTPD. You are running
into the condition where all SMTPD ports are busy.
No amount of POSTSCREEN tweaking will prevent that.
Wietse
