I have made threads subscriptions.
But when I got Emails, with different topics, I can see only this:
[PortableApps.com - Portable software for USB, portable and cloud drives] thread subscr...
so I can't realize easily what topic I got response.
So make the subject short - the name of topic
Another thing is that I got an Email even if it was just me that replyed to the topic.
I think it will better to get an Email notifications only when others are replying but not me.