How do i get submissions in separate emails, rather than one continuous one?

There's a high chance you're describing the CONVERSATION VIEW feature of most emails. This isn't JotForm-related, it's something you need to adjust on your email settings.

Since you never provided any further info, I'll just cite some external links on several email platforms:

How do I turn off conversation view in Outlook Web Access for my Office 365?

How do I turn off threaded conversations in Gmail?

How do I turn off arrange by conversation in Mail for Windows 10?

In case we misunderstood, kindly get back to us with more info and a better description of what you're trying to achieve so we can better assist you.