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!
■ 代表的な SMTP サーバー
SMTP サ ー バ ー を 構 築 す る ソ フ ト ウ ェ ア と し て Sendmail や Postfix、
qmail、Exim などが有名です。過去には Sendmail が広く普及していました
が、最近は Postfix が多く使われています。
また、一般の利用者同士がメールのやり取りに使う SMTP サーバーだけで
なく、システムからメールを送信するような使い方であれば、クラウド型で提
供されるサービスも多く使われています【表 3-1】。
表 3-1
システムからの送信に使われるサービス
サービス名 特徴
SendGrid
独自の
API
を使ってメールだけでなく
SMS
なども配信で
きる。大量のメールの配信にも向いている。
AmazonSES
AWS
（
AmazonWebServices
）のメール送受信サービ
スで、大規模かつ信頼性が求められるものに向いている。
Postmark
商品の購入や会員登録など、利用者の操作に対して送信さ
れるトランザクションメールに特化している。
Mailgun
開発者向けのメール配信サービスで、さまざまなプログラ
ミング言語から
API
を使って手軽にメールを送信できる。
Brevo
（旧
SendinBlue
）
ニュースレターなどに使えるテンプレートや、メールの自
動化を実現するワークフローなどを備える。
3
1
メールサーバーの種類
・メールサーバーの種類を知りたい方
・グループウェア一体型の製品について知りたい方 ...
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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.