What is e-mail (electronic mail or email) – Electronic email, or email, is a method of swapping digital messages between people using digital devices such as computers and mobile phones. Emails first entered substantial usability in the 1960s and in the mid-1970s have taken the form now known as email. Email operates on computer networks, which today mainly are the Internet. Some early email systems require authors and recipients to both online at the same time, similar to instant messaging.
Today’s email system is based on store-and-forward model. The mail server receives, forwards, sends, and stores messages. Neither their users nor their computers are required to be online simultaneously; They only need to connect briefly, usually to the mail server or webmail interface, as long as it takes to send or receive messages.
Originally an ASCII text only communication medium, Internet email was expanded by Multipurpose Internet Mail Extensions (MIME) to carry text in a collection of characters and other multimedia content attachments. International mail, with an international email address using UTF-8, has been standardized, but by 2017 it has not been widely adopted.
The history of modern Internet email services reached the early ARPANET, with a standard for encoding email messages published in early 1973 (RFC 561). Email messages sent in the early 1970s look very similar to the basic emails sent today. Email played an important role in creating the Internet, and the conversion of ARPANET to the Internet in the early 1980s produced the core of today’s services.
Many email providers have web-based mail clients (eg AOL Mail, Gmail, Outlook.com, Hotmail and Yahoo! Mail). This allows users to sign in to their email accounts using a compatible web browser to send and receive their email. Mail is usually not downloaded to the client, so it can not be read without an internet connection at this time.
POP3 email service
Post Office Protocol 3 (POP3) is a mail access protocol used by a client application to read messages from a mail server. Messages received are often deleted from the server. POP supports a simple download-and-delete requirement for access to the remote mailbox (named maildrop in POP RFC).
IMAP email server
Internet Message Access Protocol (IMAP) provides features to manage mailboxes from multiple devices. Small portable devices such as smartphones are increasingly being used to check email on the go, and to give short answers, larger devices with better keyboard access are used for longer answers. IMAP shows message headers, senders and subject and devices need to request to download certain messages. Mail is usually left in the folder in the mail server. What is Email Hosting Server
MAPI email server
Messaging Application Programming Interface (MAPI) is used by Microsoft Outlook to communicate with Microsoft Exchange Server – and various other email server products such as Axigen Mail Server, Kerio Connect, Scalix, Zimbra, HP OpenMail, IBM Lotus Notes, Zarafa, and Bynari where vendors have Add MAPI support to allow their products to be accessed directly through Outlook.