Their email system doesen't work for some time...
Try contacting them on IRC

"IRC Server

Amsterdam, NL
Default: 185.111.75.28 19435
SSL: 185.111.75.28 +19436
Dronten, NL
Default: 185.111.75.224 19435
SSL: 185.111.75.224 +19436


All the servers are now added to the host: irc.tntracker.org

Info

Your nick HAS to be the same as you use on TNTracker!

To join the channels you must invite yourself here.

You can register your nick via Nickserv to be able to join without inviting yourself.
Just do /msg nickserv register <aPassword> <yourEmail> - Your nick HAS to be the same as on TNTracker while doing this!
After registering your nick reinvite yourself via this site - even if you are in the channels already. After that do /msg hostserv on
This sets a virtual Hostname for your Nick which enables you to join the channels. To autologin simply use the password you used above as the server password."