You are trying to send through another ISP SMTP server while not logged on
to their service. ISPs are denying relaying as it is one of the major spam
vectors. You need to set your outgoing server to authenticate using the
incoming server credentials.
Post all replies to the group to keep the discussion intact. Due to
the (insert latest virus name here) virus, all mail sent to my personal
account will be deleted without reading.
After searching google.groups.com and finding no answer, kwojames asked:
| It happens more often than not, but a lot of stuff is coming back
| undeliverable. And I'm really tired of that 550 message: 550
| relaying to <*******@juno.com> prohibited by administrator
| PeoplePC has not been the biggest help in this.