![]() POP or IMAP Agreement users can MTA The postal service agreement provided by the host (Post Office Protocol, POP) To receive your own letters, Or through IMAP (Internet Message Access Protocol) The protocol keeps its mail on the mail host, And further establish the mail data box and other advanced work. This is the so-called transmission (Relay) The function of. If the destination of the letter is not the user itself, And the relevant data of the letter is consistent with the use of MTA The power of, that MTA The message will be sent to the next host. ![]() MTA The main function of the host is to come from the client or other MTA I'll take your letter, This is the time MTA It uses Simple Mail Transfer Protocol (SMTP), It uses 25 port. Just as the name suggests, Since it is 『 delivery The agent 』, So the letter sent by the user, When the user wants to receive the message, Just look for it (MTA) That's right ! Basically, MTA These are the functions of :ġ) Receiving letters : Using simple mail transfer protocol (SMTP) MUA Help users send mail to the mail host, If this mail host can help users send this letter, So it's a mail delivery host (MTA) La ! This MTA Namely 『 Mail delivery agent 』 It means. The most common MUA Like Mozilla To launch the Thunderbird ( Thunderbirds ) The free software, Or is it Linux desktop KDE common Kmail, And Windows Design of Internals Outlook Express (OE) etc.MUA The main function is to receive e-mail from the e-mail host, And provide users with the function of browsing and writing e-mail ! ![]() #Warning mail queue enter create file maildrop softwareMUA both " Mail user agent ", Because unless you can take advantage of something like telnet Software such as log in to the mail host to send out mail on its own initiative, Otherwise you have to go through MUA To help you deliver the mail to the mail mainframe. ![]()
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