According to this topic  it's possible to subscribe to a thread. But on our message board I can't find the option to do this.

So how do I enable this?

Thanks for your help!

Users in your forum have 2 options to receive email notifications for topics:

1- If users want to be notified about new posts in each topic that they have posted a message, they should go to: My Profile->Edit Profile and check the Watch every topic in which .... checkbox in the forum settings folder. (See attachment no.1)

2- Uesrs always can use Watch this topic link available in options menu which can be found in evey topic page's top right corner. (see attachment no. 2)