Michele: > Hi list, > I have a system that receive mails from internal network and deliver them > directly on Internet. Sometimes mx server for some domains, refuse mails for > users. It's there the possibility, by postfix, to relay that mails to a safe > server that, I'm sure, will accept that mails and will know what do with them?
If the remote SMTP server rejects with a permanent error code (5XX), Postfix will send a bounce message to the envelope sender address. You should not override this with "softbounce=yes" because Postfix will hammer multiple MX servers with the same undeliverable recipients. Otherwise, Postfix can send to the server(s) specified with smtp_fallback_relay. http://www.postfix.org/postconf.5.html#smtp_fallback_relay Wietse
