I am trying to setup an email server with qmail and postfix as a MTAs.
I am using postfix to handle my outbound mail flow traffic.
I have set postfix
maximal_queue_lifetime to 2d. If some mail gets rejected temporarily then postfix holds it for 2 days then generates bounce back.
So users get an NDR (Bounce back) after 2 days.
What I want:
Can anybody tell me whether there is any standard to set queue lifetime in MTAs?