Commas in an email greeting

Which of the following is correct in a written greeting, e.g., letter; email; text message?

1. Hi, Mary,

2. Hi Mary

[bhaisahab]

Originally Posted by Unregistered

Which of the following is correct in a written greeting, e.g., letter; email; text message?

1. Hi, Mary,

2. Hi Mary

Neither is correct, "Hi Mary," is correct.

[Anglika]

There is a confusion - if neither is correct, why is the comma between Hi and Mary correct [ which in my view it is].

[bhaisahab]

Originally Posted by Anglika

There is a confusion - if neither is correct, why is the comma between Hi and Mary correct [ which in my view it is].

Oh, do you really think so? OK, it's just a matter of personal preference then.