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。
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。
yum -y install dovecot
yum -y install cyrus-sasl
インストールできたかの確認
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
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
+++ /etc/dovecot/conf.d/10-mail.conf 2020-08-05 00:53:15.719860050 -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
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
+++ /etc/dovecot/conf.d/10-auth.conf 2020-08-05 00:54:24.904733010 -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
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
+++ /etc/dovecot/conf.d/10-ssl.conf 2020-08-05 00:55:07.192434703 -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
systemctl start saslauthd
systemctl enable saslauthd
systemctl start dovecot
systemctl enable dovecot
メール受信確認
Postfix お手軽設定＆起動＆利用 で送信したメールを確認してみる
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？