Option to send an email if someone replies to your comment

Hi,

It would be great if the plugin had an option that automatically sends a reply email if someone replies to your comment.

I recently left a comment on one of your blog posts. I never knew Michiel replied to me until I checked back on the article a few weeks later. I think I should have received a notification email about that reply. Preferably with the reply itself and a link to the reply on the website.

Think about the following options:
1) If an contributer/author/editor/admin replies, always send a notification to the original commenter
2) Allow commenters to (un)subscribe to (all) replies to their own comment.
3) Allow commenters to (un)subscribe to all comments on the same article.
4) Allow commenters to subscribe to your mailing list (maybe best via zapier)

For 2 and 3: option to set this as default on or off.
I know there are other plugins that have that functionality

Thanks
JP

The page I need help with: [log in to see the link]