This was a BIG problem for me too, but until i resolved it a month ago.
Turns out, there isn't any setting to just turn off the email notifications for already subscribed threads. So this is what I did, to resolve it:
Goto, UserCP -> Edit Options. And then, select, No Email notification under, Default Thread Subscription Mode.
This step would prevent you to send mails, for any thread that you later join. But wouldn't stop mailing you for the threads which are already subscribed.
Then, I went on to every thread subscribed, and Re-Subscribed through, Thread Tools. (Resubscribed = Unsubscribe and then Again subscribe)
Mod knows, if there was an easy solution to this, but I had tried to find that in vain, earlier on.
Turns out, there isn't any setting to just turn off the email notifications for already subscribed threads. So this is what I did, to resolve it:
Goto, UserCP -> Edit Options. And then, select, No Email notification under, Default Thread Subscription Mode.
This step would prevent you to send mails, for any thread that you later join. But wouldn't stop mailing you for the threads which are already subscribed.
Then, I went on to every thread subscribed, and Re-Subscribed through, Thread Tools. (Resubscribed = Unsubscribe and then Again subscribe)
Mod knows, if there was an easy solution to this, but I had tried to find that in vain, earlier on.