Hello Group, I am trying some extra configuration for postfix where it would mark some destinations as undeliverable. I have found that there are some destinations, start deferring the mails (may be greylisting) for a particular period of time (times ranging from 1min to 4hrs), and after the time window is over, they accept mails properly. So, I would like to configure per-destination dead time limit, where Postfix would not attempt any delivery at all to a destination for the mentioned time.
I tried configuring backoff-time, but it only comes into picture after first attempt, which will get deferred, during time the destination is differing. Next, I found "default_destination_concurrency_failed_cohort_limit", but I was unable to find to time for which it will remain dead. I know this is transport configurable, so I can configure different time limits for different destinations. This is because, I do not want any delivery attempts during the time when a destination is marked dead. Is this possible? If yes, then how? Thanks. DN Singh
