Have a look at
http://www.systemwebmail.com/faq/4.2.3.aspx>>I have seen this error on Windows 98 computers that are trying to send e-mails using System.Web.Mail. Is this your case?
>
>I have this on Win XP Pro and it has been reported on a client site with Win2K.
Éric Moreau, MCPD, Visual Developer - Visual Basic MVP
Conseiller Principal / Senior Consultant
Moer inc.
http://www.emoreau.com