Dear Colleagues, in our infrastructure we are using Postfix as a relay server which is responsible for transfering messages from our MS Exchange and Production systems. Our infrastructure include several Postfix relays:
M$Exchange(lan) ---> Postfix1(middleware lan) ---> Postfix2(application lan) ---> Postfix3(web lan) ---> Internet I would like to ask You, what will happend if Postfix2 will be offline ? How Postfix1 will behave ? a) will it bounce all messages from M$ Exchange users with answer that host is not able to deliver messages ? b) or maybe it will store all messages in the deffared queue for the certain amount of time and will try to resent them every 300s ? In case of any outage of Postfix2 or 3 I would like to store all E-mails in the deffered queue till moment when Postfix2/3 will be again available ? M$ Exchange sending every minute ~10 000 E-mails. How to configure it properly then ? Using this parameter ? *bounce_queue_lifetime* *If outage will take longer, we need to store thousands of E-mails in the deffered queue, is there any limit for number of messages stored in the deffered queue ?* *Thanks in advance for any hints* *Cheers* *Zalezny*
