I get this 452 error when trying to send any email from a pc, whether I use Incredimail or outlook express and whether a new instance of either is created.
From what I've found out it suggests a problem with the ISP's smtp server and not the pc. However, the ISP (ntlworld, the UK Cable provider) say there is nothing wrong their end. I have tried turning off Zone Alarm without success.
Is there somewhere else I should be looking for a solution??