Dear Sir or Madam...
Hello everyone!
Could someone please tell me, is it still OK to start an e-mail with "Dear Sir or Madam"? That's what I learnt many years ago, and I've always found it hilarious (sorry, but seriously, it just sounds weird!), but now I have to write a semi-official letter addressed to I-have-very-little-idea-about-who-they-are, and... well, maybe it doesn't sound as weird to a native English speaker? In Russian I would just start with "Hello" in such a case but maybe it would be rude in English (after all, sirs and mesdames sound funny to my Russian ear as well)? Can someone please help me out, how would a normal person start an official/semi-official letter addressed to "someone who works in this department and/or checks the mail"?