MadeEasy Subject Test 2019: Computer Networks - Application Layer protocols

Question

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Emil Client is application which give ways to manage and view mails.It's email server which is a message transferring agent, so mail come from email client to it's email server which then perform DNS to get the IP address of the receiver and send mail to his mail server.Receiver can view mail either using email client or webmail.

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Ok

when this will be used SMTP -> DNS -> SMTP -> POP3/IMAP ?

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Post Office Protocol is used take mail from the mail server.