Definition of Email Electronic mail (email or e-mail) is a method of exchanging messages ("mail") between people using electronic devices. Email entered limited use in the 1960s, but users could only send to users of the same computer. Some systems also supported a form of instant messaging , where sender and receiver needed to be online simultaneously The rules for writing formal emails in English To write an email in English in the right way, don’t improvise! Read the following advice to avoid making serious mistakes that could compromise the success of the email from the moment it is received. Subject The subject is the first piece of information that the recipients of an email see, and if it’s written incorrectly or unclearly, it could push the reader to delete it without even opening it! Style Unlike many other languages which require long complex sentences in a formal written context, English is very concise and favors short sentences and a simple struct