"What could Iran possibly stand to gain from snooping on Israeli police?" I can think of lots of things, starting with information that is shared by Mossad. Even identifying the police officers who liaise with the intelligence service might be useful. If you can grab that info along with maybe the code names for a few projects, you can follow up with another email that sounds more plausible "Hey this is Moishe, can you shoot me the latest on the XYZ investigation?"