Possible Duplicates:
Salutation in an Email
How do you greet multiple recipients in an e-mail?
How do I use the initial words while writing an e-mail, in particular, to my superiors?
Suppose somebody is writing a letter to the HR representative of a company, requesting a letter, approval, information, etc. Should the salutation be written like:
Hi
or:
Dear
or her/his name:
Dear Jenny
Are any of these proper way? Or, should I leave it blank and start with the crux of the matter right away?
Does it matter whether I know the person or not, or if the person is not my superior but is a colleague or junior?