IMAP
From RemObjects Software
The Internet Message Access Protocol or IMAP is one of two of the most prevalent Internet standard protocols for e-mail retrieval, the other being Post Office Protocol (POP3). Virtually all modern e-mail clients and mail servers support both protocols as a means of transferring e-mail messages from a server, such as those used by Gmail to a client, Mozilla Thunderbird and Microsoft Outlook.
Many implementations of webmail use IMAP to retrieve e-mail message from a server and display them within a web browser, making the use of this protocol transparent to the user.
