Am 28.01.2015 um 15:28 schrieb deoren:
I searched via Google and via the mailing list archives, but I didn't
find a post which matched my specific situation.
I see those warnings in the logs when the system goes down for a reboot.
Is the mail lost? Should I be using a different approach when rebooting
a server running Postfix? Does the client receive an error and it's then
up to it to try again?
you need to provide the loglines before *and* after that message
anyways, that's not a normal behavior and the way how postfix and the
SMTP protocol is designed for the delivering client a message is counted
as undelivered until the destination responds with a 2xx code
since postfix can't write the queue file it won't answer with 2xx
