A protocol used when email software receives email from an email server. After authenticating the user using a username and password, the software connects to the email server and downloads the email. It also has a function to instruct the server to delete emails and mark them as read/unread. Currently, POP3, version 3 of POP, is widely used. Note that because POP sends usernames and passwords in plain text, a protocol called APOP (Authenticated Post Office Protocol), which encrypts passwords to enhance security, is also used. Source: ASCII.jp Digital Dictionary About ASCII.jp Digital Dictionary Information |
メールソフトがメールサーバーからメールを受信するときに使われるプロトコル。ユーザー名とパスワードなどを利用してユーザー認証をしたうえでメールサーバーに接続し、メールをダウンロードする。また、メールの削除や既読/未読の設定をサーバーに指示する機能も持つ。現在は、POPのバージョン3であるPOP3が広く使われている。なお、POPではユーザー名とパスワードを平文で送るため、パスワードを暗号化してセキュリティーを高めたAPOP(Authenticated Post Office Protocol)というプロトコルも利用されている。
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