450 error when sending email in outlook 2003

[Guest]

I have a manager that is receiving a 450 error (abuse - go away) when sending
email from outlook. She can receive just fine. She can send and receive from
the web browser.

I deleted and reinstall account and same issue. Not sure what to try next.

 

[Guest]

Could you please post the exact error message? Thank you.

 

[Guest]

Here is the full error message. She gets this no matter who she sends mail to.

It is a pop3 account that we use Outlook 2003 to send/receive mail. We have
not changed any settings at all on any of our PCs. We have been using these
email accounts and outlook for 2 years and no problems til this past Friday.
email provider says it's outlook. ISP says it is not them. So on I go to
figure this out or hope it magically fixes itself.

our message did not reach some or all of the intended recipients.

Subject: FW: test
Sent: 9/12/2007 2:17 PM

The following recipient(s) could not be reached:

'(e-mail address removed)' on 9/12/2007 2:17 PM
450 <[email protected]>: Recipient address rejected: Policy
Rejection- Abuse. Go away.