Viktor Dukhovni said the following on 07/12/2012 16:46:
Postfix does NOT cache transport lookups in the queue file, each time a message is retried new transport lookups are performed for each recipient. Perhaps your active queue contained a backlog of messages awaiting their next attempt to reach the dead server. With the transport table updated you just need to wait, but if you prefer, a "postfix reload" will drain the active queue back into the incoming queue, and the transport lookups will then be fresh.
You are right, waiting for the next retry solved the problem. Thanks! Ciao, luigi -- / +--[Luigi Rosa]-- \ 8 bit di dati, 1 bit di stop, nessuna pieta`