It doesn't seem to me that FROM is the problem. I have an identical Contact Form on another similar site and I installed a recordset with one e-mail address, then configured the form's mail functions to insert the email address from the database and successfully sent the mail using smtp from there. The FROM address inputted via the contact form was a Gmail account.
On the new site, when I use a static TO email address in the configuration, it sends the mail but it doesn't send the mail when the address come from the recordset although it redirects to the Thank You page.
The contact form needs to be installed in two areas on my new site where my users info appears. Here the recordsets are a bit more complicated and this may indeed be the problem. Actually this works on the old site I am renovating but using the older WA Globals and co.
Question: What are the advantages of using SMTP over Sendmail - and would that make this easier?
It looks like I will need a Premier Support ticket to get this solved.