Luis Miguel Flores dos Santos: > Existe a way to postfix use another transport method to send bounce > messages? or I can do it only with "before queue"?
No, but you could set
/etc/postfix/main.cf:
smtpd_reject_unlisted_sender = yes
and stop accepting mail via SMTP that has an unknown sender address
(it does not block unknown senders with the Postfix 'sendmail'
command).
Wietse
