On 20 Oct 2008, at 10:24, Wietse Venema wrote:
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
Is there any reason I couldn't chain these?
ie. set it up so the fallback relays point as such:
out1->out2
out2->isp
-N.
