My client receives a quote request from their site. They would like to send an html email in response back to their client. I was thinking my client would fill out a form on their site with the fields that would be editable in the response email and that form would generate an html email with the variable info and send it back to the requestor.
How is this possible?
Campaign Monitor does not have generalised auto-responder type emails like you describe. To send through Campaign Monitor you need to actually login to the application, it can't be automated at this stage.
We do offer HTML subscription confirmation emails, which you may be able to use though.