I am trying to get one postfix server (a zimbra server) to authenticate through sasl to another postfix server (production mail) so it can be used as a relay host.

But I notice that the authentication method in /etc/postfix/sasl/smtpd.conf on the other machine is auxprop because that machine uses mysql as a back end.

How do I get the first postfix server (zimbra) to authenticate against the second postfix server so that the second postfix server (production mail) can be used as a relay host?

When I try to send mail using the postfix setup on the zimbra server I get:

: SASL authentication failed; server
mail.beta.beezag.com[] said: 535 5.7.8 Error: authentication
failed: authentication failure