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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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.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.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.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.
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POPサーバー、IMAPサーバーの構築
■ Dovecot をインストールする
前節で構築した 1 つ目の SMTP サーバーによって、外部からメールを受信
できるようになりました。そして、届いたメールは Maildir に格納されていま
す。このメールを利用者がメールソフトを使って受信できるように受信メール
サーバーを構築します。
POP サーバーや IMAP サーバーを構築するとき、Dovecot を使うことにし
ましたが、これを Postfix などの送信サーバーと同じコンピュータで構成する
こともあれば、別々のコンピュータで構成することもあります。本書では、検
証用として動作を確認することが目的なので、同じコンピュータ（VPS）で
両方のサーバーを動作させることにします。
複数のサーバーを動作させるときは、リソース（CPU、メモリ、ストレー
ジ、ネットワーク帯域など）の確保が必要です。これらが不足するとパ
フォーマンスの低下やサーバーダウンなどが発生するため、本番環境で稼
働させるときは、必要な性能について事前に検証が必要です。
・POP サーバーや IMAP サーバーを構築するとき
・Dovecot を VPS 上の Linux にインストールするとき
・Dovecot-SASL を使って、SMTP AUTH で認証させるとき
使えるのはこんな人や場面！
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3
POP サーバー、IMAP サーバー
の構築
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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.