(prologue here : viewtopic.php?f=99&t=35034
Currently the link URL in the notification email to the new posts in a thread requires a login, so the forum SW knows the user visited the thread and decides to send new notification on future new posts.
I suggest detecting the users visit without the login.
The additional login step can be distracting or even unwanted (when not on ones own PC etc.).
A rough implementation idea:
use an ID in the URL (similar as with the first registration confirmation URL) that tells the server who is visiting.
* - are there special forum internal links ? Some forum SW support them. Makes linking to other posts and threads easier. They also remain valid when the site URL is reorganized)