Fixing ASP when sending from server -- error '8004020e'

I did a little ASP page for a Flash website that mails from a form -- standard stuff. However, I was getting error '8004020e'. I researched this on the web and found the helpful link: http://support.bebosoft.com/kb/article.php?knoid=117&t=The+script+returns+error+8004020e. It turns out that I was setting the "From" value in the CDO code to be the actual email address that the user entered in the form. Since I was trying to send a message from the server from a domain not hosted on the server, it appeared to the server as spam and was rejected. When I changed the "From" to the actual domain name hosted (e.g. website@domainname.com) it ran fine. I thought that setting the "From" to be the person sending the email was a good idea, but now I understand how that could appear to be spam and an invalid address. Lesson learned!