1. bakachou

    Posted

    bakachou
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+Dovecot お手軽設定&起動&利用
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@@ -0,0 +1,157 @@
+#はじめに
+
+Dovecot をお手軽に起動して POP サーバを起動する手順です。
+
+セキュアサーバの設定などは置いといて、自分のローカル環境などで POP サーバを立てたいなどお手軽に設定する手順なので注意してください。
+
+環境は Red Hat Linux 7 です。
+
+```bash
+cat /etc/redhat-release
+Red Hat Enterprise Linux Server release 7.7 (Maipo)
+```
+
+# インストール
+
+Dovecot とそれに必要なライブラリをインストールする。
+
+```bash
+yum -y install dovecot
+yum -y install cyrus-sasl
+```
+
+インストールできたかの確認
+
+```bash
+rpm -q dovecot
+dovecot-2.2.36-6.el7.x86_64
+```
+
+# 設定
+
+以下の3つのファイルを修正する
+
+* /etc/dovecot/conf.d/10-mail.conf
+* /etc/dovecot/conf.d/10-auth.conf
+* /etc/dovecot/conf.d/10-ssl.conf
+
+
+## /etc/dovecot/conf.d/10-mail.conf の設定
+
+```bash
+diff -u /etc/dovecot/conf.d/10-mail.conf.orig /etc/dovecot/conf.d/10-mail.conf
+--- /etc/dovecot/conf.d/10-mail.conf.orig 2020-08-05 00:52:01.488157996 -0400
+@@ -28,6 +28,7 @@
+ # <doc/wiki/MailLocation.txt>
+ #
+ #mail_location =
++mail_location = maildir:~/Maildir # 各ユーザのホームディレクトリにある Maildir
+
+ # If you need to set multiple mailbox locations or want to change default
+ # namespace settings, you can do it by defining namespace sections.
+@@ -194,6 +195,7 @@
+ # may lead to root exploit. Usually this should be done only if you don't
+ # allow shell access for users. <doc/wiki/Chrooting.txt>
+ #valid_chroot_dirs =
++valid_chroot_dirs = /home
+
+ # Default chroot directory for mail processes. This can be overridden for
+ # specific users in user database by giving /./ in user's home directory
+@@ -410,3 +412,5 @@
+ # negate an exclusion (e.g. content-type=!foo/* content-type=foo/bar).
+ # exclude-inlined - Exclude any Content-Disposition=inline MIME part.
+ #mail_attachment_detection_options =
++
++
+```
+
+
+## /etc/dovecot/conf.d/10-auth.conf の設定
+
+```bash
+diff -u /etc/dovecot/conf.d/10-auth.conf.orig /etc/dovecot/conf.d/10-auth.conf
+--- /etc/dovecot/conf.d/10-auth.conf.orig 2020-08-05 00:53:29.224444797 -0400
+@@ -8,6 +8,7 @@
+ # connection is considered secure and plaintext authentication is allowed.
+ # See also ssl=required setting.
+ #disable_plaintext_auth = yes
++disable_plaintext_auth = no # PLAINTEXT での認証もできるように修正
+
+ # Authentication cache size (e.g. 10M). 0 means it's disabled. Note that
+ # bsdauth, PAM and vpopmail require cache_key to be set for caching to be used.
+```
+
+
+## /etc/dovecot/conf.d/10-ssl.conf の設定
+
+
+```bash
+diff -u /etc/dovecot/conf.d/10-ssl.conf.orig /etc/dovecot/conf.d/10-ssl.conf
+--- /etc/dovecot/conf.d/10-ssl.conf.orig 2020-08-05 00:54:47.618035671 -0400
+@@ -5,7 +5,8 @@
+ # SSL/TLS support: yes, no, required. <doc/wiki/SSL.txt>
+ # disable plain pop3 and imap, allowed are only pop3+TLS, pop3s, imap+TLS and imaps
+ # plain imap and pop3 are still allowed for local connections
+-ssl = required
++#ssl = required
++ssl = no # SSL の利用しないように変更
+
+ # PEM encoded X.509 SSL/TLS certificate and private key. They're opened before
+ # dropping root privileges, so keep the key file unreadable by anyone but
+```
+
+# デーモン起動
+
+```bash
+systemctl start saslauthd
+systemctl enable saslauthd
+systemctl start dovecot
+systemctl enable dovecot
+```
+
+
+# メール受信確認
+
+```bash
+telnet localhost 110
+Trying ::1...
+Connected to localhost.
+Escape character is '^]'.
++OK Dovecot ready.
+user <ユーザ名>
++OK
+pass <パスワード>
++OK Logged in.
+stat
++OK 1 546
+list
++OK 1 messages:
+1 546
+.
+petr 1
+-ERR Unknown command: PETR
+RETR 1
++OK 546 octets
+Return-Path: <<メールアドレス>>
+X-Original-To: <メールアドレス>
+Delivered-To: <メールアドレス>
+Received: from <ホスト名> (localhost [IPv6:::1])
+ by <ホスト名> (Postfix) with SMTP id 9279EC00DBF
+ for <<メールアドレス>>; Thu, 6 Aug 2020 01:20:07 +0000 (UTC)
+Message-Id: <20200806012015.9279EC00DBF@<ホスト名>>
+Date: Thu, 6 Aug 2020 01:20:07 +0000 (UTC)
+From: <メールアドレス>
+
+aaaaa
+.
+DELE 1
++OK Marked to be deleted.
+quit
++OK Logging out, messages deleted.
+Connection closed by foreign host.
+```
+
+あれ? PETR って大文字じゃないとダメなの?