Our email address keeps going into banned list?

We are not receiving form responses because it says our email address is on a banned list. When I log on, it gives me an option to remove from banned list. But it had happened again only a day or two later. 

Hey br4010,

In order to prevent recurrence of bounce/block problem please perform actions described in following pages

https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues

https://www.jotform.com/help/145-Whitelisting-JotMails-IP-Addresses

https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form

https://www.jotform.com/help/262-How-to-Remove-Your-Email-Address-from-Bounce-List

Thank you for writing us.

Have a nice day.