Can I use jotform to do an email blast like constant contact?

Hello Martti,

Thank you for contacting us. If you want to send emails to your own users, kindly check the  Email Newsletters app. It should help you send an email to your own user who submits the form.  I also suggest you check our email applications:

 https://apps.jotform.com/category/emailling

If you have any question or issues, please do not hesitate contacting us. We will be glad to assist you.