In a salutation on a line by itself, which version is punctuated correctly? Hi, Mr Lawler, I am writing to say [...] Hi Mr Lawler, I am writing to say [...] Hi, Mr Lawler. ...
A friend of mine uses both an exclamation mark and a comma in his letter salutations, like so: Hi George!, I have never seen this before, and was wondering if it's grammatically kosher. ...