553 sorry, your envelope sender domain must exist (#5.7.1)

[Dennis James]

Some time ago I was trying to send root mail to an isp smtp
mail.m.mynet.net.au.
I have succeeded in sending the email when doing a test, but I get the
following error.

553 sorry, your envelope sender domain must exist (#5.7.1)

The domain of the machine is localhost.localdomain.

I want only to be able to send email (to my email address and a work
address) logs to myname at mynet.net.au.

I do not want to receive mail only send root mail and log files.

Is there a simple way of doing this.

I have had assistance previously which helped a lot.

Regards


Dennis @ Scone