How does e-mail?



How does e-mail? To send or receive e-mails need only know the recipient's email address.

E-mail account is protected by a password that the user clicks.

Create e-mail account can be different ways:
1. If you have an account with your ISP, you may have and account POP (e-mail protocol).
2. You can e-mail account with web-based organizations that provide free email services such as Hotmail, Yahoo, Mail, Rambler, Google and others.

E-mail, web-based interface, typically implemented with a protocol called IMAP.

Protocol IMAP - similar POP, it is also used to download mail. Unlike POP, the specified protocol will download the headers and in constant communication with the server.

It is not as stable as POP, but has two benefits:
• Due to the fact that there is no downloading each message, it is possible to manage a large number of letters.
• You can use IMAP to delete certain messages directly from the server.

You can make as many email addresses, how will the memory, ie, if you can remember all these addresses and passwords. But if you need to have a large number of email addresses, for example, to send information, for this there are special programs, as well as to store all the usernames and passwords hidden under one password.

When you send an e-mail protocol is used SMTP. This is the language in which your computer communicates with another vehicle in the email.

If you receive an e-mail program mail client also enjoy POP or Internet Message Access Protocol (IMAP), which depends on the server from which it receives mail.

Let us see how the e-mail is the way to its recipient on a different point on the globe.

E-mail system of the Internet, in essence, is the union of client-server and server-server, which employs a group of invisible agents. The e-mail composed by client programs such as Microsoft Outlook Express, Netscape Messenger, The Bat, KMail, Novell GroupWise, Lotus Notes and others.

Electronic mail carrier delivers it to the designated post office, ie, the outgoing mail server that you have chosen. This server may be required to enter into relationship with another mail server, if the recipient is outside the zone of responsibility. After receiving an e-mail, mail server on the receiving end asks another program running on the server to put the letter in the mailbox of the recipient.

Actual receipt of an e-mail from the mailbox on the incoming mail server performs the receiving client.

Mail client software, called the User Agent mail - Mail User Agent (MUA), a mail server - the message transfer agent - Mail Transfer Agent (MTA). MUA is engaged in both delivery and receipt of email messages.

Posting messages to e-mail recipient's mailbox is in fact not involved in the AIT. This is responsible for another small program, called Agent Message Delivery - Mail Delivery Agent (MDA).

As we see, in the processing of e-mail involves various software agents. Like the people to do their job, they must use a common language, which is the protocol.

 
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