One area of difference between traditional letters and emails is in greetings. Ln a letter, it is normal to start like `Dear Mr Black`, in an email , it is also acceptable to begin in this was - but it is also very common to write only the person`s name.
The same applies to the ending of email. Ln more formal email messages you should better use the same kind of ending like in a letter. However, in informal messages it is more common to use an informal ending.Here is a summary of some of ways people begin and end their messages.