People write e-mails using its special style and rules. There are some abbreviationswhich are used there. For example "P№ stands for "please", "B4" is "before", "asap" is "as soon as possible".These letters are ended with "Best" (short for "Best wishes"), "Regards" or"Yours"(if you are writing to a man you don't know well). People usually signe-mails with their first names.
You write: your name after the word "from"',
the date after "date",
the name of the person you write to after "to",
the name of the people you also send your letter to after "Cc",
the subject of your letter after "subject",
what documents, photos or other additional
materials are sent together with the letter after "attach".