Can I email my customers and do a survey

Yes you can, please check this guide, here is how: https://www.jotform.com/help/303-How-to-Share-Form-using-Email-Link

Here are some guides that might be of your interest:

https://www.jotform.com/help/170-A-Guideline-to-Create-the-Perfect-Survey-Form-Part-1

https://www.jotform.com/help/193-A-Guideline-to-Create-the-Perfect-Survey-Form-Part-2

https://www.jotform.com/help/202-How-to-Create-a-Solid-Customer-Satisfaction-Survey

Let us know if you have more questions, we will be glad to assist you.