I understand that it's Sehr geehrte Frau Marie for females, Sehr geehrter Herr John for males, Sehr geehrte Damen und Herren for Dear Sir/Madam.
But what is 'Dear (name)' such as 'Dear John,' or 'Dear Marie,'?
I'm looking for the unisex version that would be used in formal letters such as:
'Dear Charlie, how are you?'... Charlie in this case is difficult to determine whether it's a male or female.