Email Prob - What does this mean?

[vex]

550 Recipient Not Authorised [recipient rejected due to no authorised destination groups]

Getting it on a number of emails I am trying to send!

[JamieBeeston]

Sounds like someone at your ISP is playing around with Relaying policies, and has broken summin.

I would advise you contact your ISPs support department on the issue.

J

[vex]

It also would not update the site here, which is why I ended up posting twice.

Sorry, Ted delete if needed.