Very much like your other idea posted here, if you subscribe to a thread, the forum will send you an email when a new reply is posted or a reply is marked as a solution. Marking as available.
To subscribe to a thread, simply click on the thread, then click the three vertical dots on the right side (of either the subject line or the post) and click "Subscribe".
Also, at the bottom of the message you're replying to, you'll see a small checkbox that says "Email me when someone replies". Make sure that's checked and you'll get those emails.