I don’t know at all what you are talking about. Please tell us in detail what you have unsubscribed and what you are getting (what do you see in the “over 50 emails a day”).
I literally get an email every time there is a comment in the forum on anything it seems like. No idea how it happened but it is driving me bananas. I cannot figure out how to make it stop.
“comment in the forum” so it’s not SVN commit logs? Don’t you see an unsubscribe link in the mail?
If it’s Forum comments, then go here:
https://wordpress.org/support/plugin/contact-form-7
And scroll down to just below the topic titles and just above the form and look for a super tiny Unsubscribe from Emails for this Plugin – if you see it click it.
OK, I clicked it. I hope it works. My inbox was out of control for a couple of days there! Thanks in advance if it works!