jan gestre: > <[email protected]>: host webmail.former.sample[210.21x.xx.xx] said: > 451 Temporary failure, please try again later. (in reply to DATA command)
Postfix always resends after 451, but it stops when the message
is too old (the default limits are: maximal_queue_lifetime = 5d
and bounce_queue_lifetime = 5d).
The maillog file will show how long Postfix has been retrying
deliveries.
Wietse
