Added Otto-Bennemann-Schule (http://www.otto-bennemann-schule.de) with...

...iserv / email domain (http://www.obsbs.de)

Our student mails ending with @obsbs.de but the school domain is otto-bennemann-schule.de.
You could look at denic.de (whois) and compare the owners of the websites.
Or look at the left side on otto-bennemann-schule.de, there is an iserv logo with a login button (Anmeldung) which redirects to obsbs.de.

Thank you in Advance! :+1: