[by sven @ Mon Jul 14 12:18 CEST 2003]
Since the old days e-mail is send over the internet by SMTP (Simple Mail Transfer Protocol), but the starting point from SMTP is that the receiver is online permanently. With the coming of computers (with telephone modems) that aren't always online, alternatives for SMTP are thought of. POP3 (Post Office Protocol) is the most used protocol. Hereby all incoming e-mail is stored on the server from the ISP (Internet Service Provider). People can then connect to the internet and get their e-mail from this server.
Another possibility is bSMTP (batched SMTP). Hereby e-mail is send by SMTP as soon as the computer gets online. If the computer is offline, the mail is saved on the server from the ISP and is send as soon as the computer is connected to the internet.
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