Hi, Postfix documentation about smtp_fallback_relay says: smtp_fallback_relay (default: $fallback_relay): Optional list of relay hosts for SMTP destinations that can't be found or that are unreachable. With Postfix 2.2 and earlier this parameter is called fallback_relay.
I have destinations not accepting email with a 451 return code. Some of them are being sent by postfix to the smtp_fallback_relay and some of them are just sent to the deferred queue... Probably i am misunderstanding Postfix documentation but... What is exactly the Postfix criteria about using smtp_fallback_relay ???? Thanks! Pete.Hi,
