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
—
—
メールサーバーとメールソフト（クライアント）
■ メールサーバーの役割
メールは複数の組織をまたいで使われるため、それぞれの組織が使うメール
システムは異なるメーカーで作られた可能性があります。世界中のコンピュー
タがやり取りをするためには、特定のメーカーで作ったシステムだけで通信で
きるのでは意味がありません。
そこで、メールの送信など、ネットワーク経由でやり取りをするときは、そ
れぞれが同じルールで通信する必要があります。このようなルールをプロトコ
ルといい、「通信規約」と訳されます。決められたプロトコルを使用して通信
することで、異なるメーカーが開発したシステムでも問題なく通信できます
【図 1-9】。
図 1-9
プロトコルの必要性
共通のプロトコルHello!こんにちは
1
2
メールサーバーとメールソフト
（クライアント）
・プロトコルの必要性に疑問を持っている方
・メールソフトと Web メールのしくみの違いを知りたい方
・メール送受信の全体像が知りたい方
使えるのはこんな人や場面！
23
013-039̲mail̲NSM̲F3.indd23013-039̲mail̲NSM̲F3.indd23 2024/01/309:372024/01/309:37
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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.