(I just got done switching from post-queue to a pre-queue setup.) Is ~45 seconds still the accepted "reasonable" value for $child_timeout in a pre-queue setup?
And, how does its value interact with Postfix's smtp_data_done_timeout? Mark once posted that $child_timeout should be less than $smtp_data_done_timeout, but does it matter how much less, or to what we set $smtp_data_done_timeout?
