In general, an e-mail is a text (having a message body, similar to a letter) along with information about the recipient, sender and so on. The postal analogy is obvious, but here you do not need an envelope. Usually, the header of a message is generated by the e-mail application used. Here in the following is a list of fields that make up the header of a message: From – the address of the e-mail (we will detail a little later what an e-mail is) of the “sender” (the user who sends the message); To – contains the e-mail address, it should be known by the sender; Subject – a description in a few words of the message – not mandatory; Date – the date on which the message was sent – the client program is fully automatic; Reply-to – is the address of the sender, if the receiver wishes to responsd to the message (useful when the user has many mailboxes and wants answers to be collected in one single session).
Next are presented other elements of an e-mail: Organization – This field is optional, represents the name of the organization (company) that has a computer on which the message is sent; Message-ID – an identification string generated by sending the mail; this identifier is unique for each message; Received – each computer that receives messages and sends messages (on the way from sender to receiver, including the sender and the recipient’s computer), has such a field; in this way you can reconstruct the path followed by the message from sender to receiver, especially if the message has more senders and more receivers; Cc (carbon copy – carbon copy) – users whose addresses are listed in this field will receive a copy of the message.
Bcc (blind carbon copy) means that the message or messages are sent to a list of readers, as well as the ordinary carbon copies (Cc). However, the header line that lists the recipients of the message is automatically deleted. Therefore, none of the recipients of the message will know who else has received this “blind carbon copy”. Signatures are used for the sent messages. They are often used to include information about the sender and how he or she can be contacted.
