We on occasions getting emails that are sent to firstname.lastname@example.org and we do not have a mailbox for administrators and emails are getting delayed some due to this. I tried to create administrators mailbox so mail sent to this can go through and then i would then log into this mailbox and delete the bogus emails that are there. But I can't create it due to active directory having a group that is called administrators. Exchange give me an error when trying to create a mailbox for it saying smtp proxy address already being used. Any way to fix this problem.