XF 2.2 Strange email url

[Ricsca]

I just noticed that the email notifications I receive have a strange forum url..
Instead of www.mysite.com they have a that doesn't work written like this:

http://bij62.mysite.com/tracking/qaR9ZGx2Zwt2BGNlZwx2AGx4ZGR4APM5qzS4qaR9ZQbkGt