Hi, recently some of our forms have been going to SPAM

Hi, could you help me figure out why our forms have recently been going to SPAM folder instead of Inbox?

I would suggest you follow this guide in order to properly set up your emails so the recipient mail service provider does not think it is a spam email: How-to-Prevent-Email-Bouncing-Related-Issues. 

Mark the email as NOT SPAM so that it will not be flagged as spam in the future. If you're using GMAIL, creating filters would help you prevent this from happening again: How-to-Prevent-Emails-from-Landing-in-Gmail-s-Spam-Folder.

You could also contact your email service provider and ask them to accept emails coming from Jotform regardless of the IP Address being used. This is to ensure that all legitimate emails coming from JotForm and AmazonSES (our email service providers) will be recognized and accepted by your email service provider.

If the problem still persists, you could also set up your custom sender by using the SMTP method, here's the guide: How-to-Setup-SMTP-for-a-Form. 

This way you will have more control over the sender info since it will be from your server.

Hope this helps.