A mailbox provider is an organization that provides services for hosting electronic mail domains with access to storage for mail boxes. It provides email servers to send, receive, accept, and store email for end users or other organizations.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is a mailbox provider? 
Ah, so.. an organization that provides services for hosting electronic mail domains with access to storage for mail boxes

Until the 1980s, the governor of the Federal District was appointed by the Federal Government, and the laws of Brasília were issued by the Brazilian Federal Senate. With the Constitution of 1988 Brasília gained the right to elect its Governor, and a District Assembly (Câmara Legislativa) was elected to exercise legislative power. The Federal District does not have a Judicial Power of its own. The Judicial Power which serves the Federal District also serves federal territories. Currently, Brazil does not have any territories, therefore, for now the courts serve only cases from the Federal District.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What does the Federal Government not have?
Ah, so.. unanswerable

The percentage of students attending a Gesamtschule varies by Bundesland. In the State of Brandenburg more than 50% of all students attended a Gesamtschule in 2007, while in the State of Bavaria less than 1% did.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What percentage of Brandenburg teachers went to a Gesamtschule in 2007?
Ah, so..
unanswerable