I need to send an email to 100 people asking for advertisement but I would like to put a submission form on the email. Is this possible, and if so, how would I go about doing it? Thanks!

years ago it was possible but now all that stuff is pretty much blocked, if there is a form and someone uses it, it will just open a browser and take them to the form. You can test it if you want to, try using an iframe, but I don't think it will work.