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!
問題なく起動しているか確認するには、次のコマンドを実行して「active」
と表示されていれば OK です。
次回以降も OS の起動時に自動的に起動するように設定するには、次のコマ
ンドを実行します。
外部から POP や IMAP で通信できるようにするには、ファイアウォールで
POP や IMAP の通信を許可します。以下では POP で受信できるように設定
しています。
ここまで設定できたら、第 2 章で解説した Telnet でアクセスしてみます。
Postfix の設定で作成したユーザーでログインすると、届いたメールを確認で
きます。
■ Dovecot-SASL で認証して送信する
送信側の SMTP サーバーにおいて、Dovecot-SASL で SMTP AUTH を使
えるようにするには、リレーホストの設定を行います。
# systemctl is-active dovecot
# systemctl enable dovecot
# systemctl restart firewalld
# firewall-cmd --add-service=pop3 --permanent
# firewall-cmd --reload
122
105-124̲mail̲NSM̲F2.indd122105-124̲mail̲NSM̲F2.indd122 2024/01/259:482024/01/259:48
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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.