right i found it

It is the option called email notification that is down the bottome between disable smilely and attach signature. It is only available hen you start a new thread.

It seems that you cant suscribe to a thread unless you started it, and you cant opt out of it later either.Thankfully threads dont usually last long so its not a big issue.

in the end.
unless you select email notification when you start a thread, then the option is never availble to you for that thread.

I tried it out in the test fourms. and i cant get an email since i made the post, which makes sense that i dont want a notification when I making the latest post.

makes sense??