To new user jerryjhon

[GrahameParish]

If the machine tries to send mail, it will be accepted if sent with authentication (like SMTP AUTH etc) but any attempts to directly send or relay should be refused as a matter of policy.

I use the AuthSMTP service for outbound emails. I bought it in for a customer with their own domain who was with BT many years ago and tacked my low-traffic domains onto it as well. It was easier than having to preauthorise each domain with the ISP at the time so I stuck with it. And my customer still uses and pays for the service.