A note regarding the "Track This Topic" option on threads - to all users who wish to receive E-Mail notification of replies to a thread, please make sure that you have a valid E-Mail address in your profile beforehand.

I have had quite a number of E-Mail failures bounced back to my inbox from people who have invalid/non-existant E-Mail addresses and have clicked on the "Track This Topic" option. If you don't have a valid E-Mail address entered, then the system won't be able to send you notification in any case, so please make sure your E-Mail address is entered correctly beforehand.

Thanks.