February 2024
Beginner to intermediate
304 pages
9h 13m
Japanese
Content preview from 実務で使える メール技術の教科書 基本のしくみからプロトコル・サーバー構築・送信ドメイン認証・添付ファイル・暗号化・セキュリティ対策まで
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2
−
7
—
—
携帯電話のプッシュ型メール
■ 新着メールを通知する
ここまでに解説した POP や IMAP は、利用者が受信の操作をして初めて
メールを受信していました。しかし、スマートフォンやタブレットではメール
を受信する操作をしなくても、メールが届いたときに利用者に通知してくれま
す。リアルタイムにやり取りできて便利ですが、どのようなしくみで実現され
ているのでしょうか。
スマートフォンやタブレットに新たなメールが届いたことを通知しようと考
えたとき、2 通りの考え方があります【図 2-12】。
図 2-12
新着メールの通知
受信操作は
不要
サーバーからの通知定期的な受信
②
メール
受信
①
受信操作
メールサーバー
143
頻繁に受信
新着
通知
メールサーバー
143
・携帯電話のようなプッシュ型メールを実現したい方
・サーバー側からクライアント側に新着メールの通知をしたいとき
・携帯電話事業者のメール通知に使われている独自のしくみを知りたい方
使えるのはこんな人や場面！
2
7
携帯電話のプッシュ型メール
99
081-104̲mail̲NSM̲F3.indd99081-104̲mail̲NSM̲F3.indd99 2024/01/309:472024/01/309:47
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.