Jacky Chan: > > I tried to set slow_destination_concurrency_failed_cohort_limit = 0, and send
And you also need to "postfix reload" before the change takes effect. > Jan 30 09:09:35 mailgw1 postfix/error[15341]: B10952EDE00: > to=<jacky11287...@yahoo.com.hk>, relay=none, delay=4.1, delays=0.1/4/0/0.04, > dsn=4.0.0, status=deferred (delivery temporarily suspended: host > c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 Message from This proves that the queue manager never got the _failed_cohort_limit = 0. Wietse