This is what their site says currently:
Maintenance Notification
At this time, we are currently moving our server locations in order to better serve you.
* Right now some web pages will not be accessible, therefore it will not be possible to make a purchase or setup new users.
* Maintenance will conclude by 14.00 Central European Time.
* Current users will not be affected and usage of SPAMfighter products will remain normal.
We apologize for any inconvenience and thank you for your support.