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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Let's learn about email technology!
■ メールの書式の拡張
7 ビットのテキストしか送信できないメールの書式を拡張するために考えら
れたのがMIME（Multipurpose Internet Mail Extensions）と い う規格 で
す。名前の通り、多目的にメールの書式を拡張するためのもので、日本語など
の文字を扱えるようにするだけでなく、画像などのファイルを添付できるなど、
さまざまなことをできるようにしています。
MIME に対応したメールを作成するためには、MIME のバージョンを指定
します。執筆時点では、バージョンとして「1.0」しかありませんので、メー
ルのヘッダーに次のように記述します。
そして、本文を UTF-8 で記述したい場合、メールのヘッダーで次のように
記述します。
これだけで本文を UTF-8 で記述できると便利なのですが、UTF-8 は 8 ビッ
ト符号で可変長の文字コードです。SMTP で送信するには 7 ビットで記述す
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
4
2
ファイルを添付する
・MIME におけるそれぞれのパートの役割を知りたい方
・ファイルを添付するときのルールを知りたい方
使えるのはこんな人や場面！
162
155-173̲mail̲NSM̲F3.indd162155-173̲mail̲NSM̲F3.indd162 2024/01/309:51 ...
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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.