Steve Jenkins:
> I've got two machines on my network - mailer1 and mailer2. Both running
> Postfix 2.9.5. I've got
>
> smtp_fallback_relay = mailer2.example.com
>
> configured in mailer1's main.cf.
The way smtp_fallback_relay is implemented, it adds each relay as
a low-priority MX host with a safety check: if the relay does not
resolve, then mail is not bounced.
If you see deferred mail on mailer1, then it still needs to be
forwarded to the smtp_fallback_relay. The maillog file should
say why that hasn't happened yet.
Wietse
