Wietse Venema:
> > The machine we are talking about is MX for all the domains that
> > belong to me (=mydestination). And exactly the way relayhost is
> > sent mails to the world they should be sent to the fallback_relay
> > if that relayhost is down.
>
> Why are you MX host for a domain, and then sending its mail to the
> relayhost? That does not seem right.
>
> If you do that, then simply turn off DNS lookups in the SMTP client
> that sends to the relayhost.
>
> /etc/postfix/main.cf
> relay_transport = no_dns_smtp:example.com
>
> /etc/postfix/master.cf:
> no_dns_smtp .. ... .. .. smtp
> -o disable_dns_lookup=yes
You may have to specify default_transport instead.
Wietse
