Contact your ISP again and have them verify your network traffic. The error
report is generated at their side.
Note that this is an Microsoft Office Outlook forum.
Outlook Express is family of Internet Explorer and Outlook of the Office
family.
Here is the link for the right forum
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.
public.outlookexpress.general
Good Luck!

Signature
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
http://www.msoutlook.info/
Real World Questions, Real World Answers
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> All my outgoing e-mails are blocked with the message: "Access denied due
> to
[quoted text clipped - 4 lines]
> autentication
> - but its not that . Anyone got any ideas.