Hi folks,
I do email marketing for a nonprofit, and sometimes several people need to review and make edits to an email before it goes out (I know, I know).

Currently, I just send a test email from our system. But when there are more than 2 people giving feedback, the email chain gets unwieldy, people give contradictory edits, etc.

So I'm wondering if there's a tool where I could upload the code, and then people could make comments line by line or something, sort of similar to collaborative documents. Having everyone make comments on the same doc would be so much easier and save me time and confusion.

I've tried searching, but have come up dry. Thoughts? Resources? Help? Thanks!