Dovecotのインストール

dnf install dovecot
Last metadata expiration check: 0:39:00 ago on Sat 21 Dec 2024 05:49:49 PM JST.
Dependencies resolved.
================================================================================
 Package        Arch     Version                              Repository   Size
================================================================================
Installing:
 dovecot        x86_64   1:2.3.16-6.el8_10                    appstream   5.2 M
Installing dependencies:
 clucene-core   x86_64   2.3.3.4-31.20130812.e8e3d20git.el8   appstream   598 k
Transaction Summary
================================================================================
Install  2 Packages
Total download size: 5.8 M
Installed size: 20 M
Is this ok [y/N]:y
Downloading Packages:
(1/2): clucene-core-2.3.3.4-31.20130812.e8e3d20 2.4 MB/s | 598 kB     00:00
(2/2): dovecot-2.3.16-6.el8_10.x86_64.rpm       7.7 MB/s | 5.2 MB     00:00
--------------------------------------------------------------------------------
Total                                           4.4 MB/s | 5.8 MB     00:01
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                        1/1
  Installing       : clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8.x86_   1/2
  Running scriptlet: dovecot-1:2.3.16-6.el8_10.x86_64                       2/2
  Installing       : dovecot-1:2.3.16-6.el8_10.x86_64                       2/2
  Running scriptlet: dovecot-1:2.3.16-6.el8_10.x86_64                       2/2
  Verifying        : clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8.x86_   1/2
  Verifying        : dovecot-1:2.3.16-6.el8_10.x86_64                       2/2
Installed:
  clucene-core-2.3.3.4-31.20130812.e8e3d20git.el8.x86_64
  dovecot-1:2.3.16-6.el8_10.x86_64
Complete!

Dovecotサービスを自動起動するよう設定します。

systemctl enable dovecot

Dovecotの設定

プロトコルの指定

view /etc/dovecot/dovecot.conf

（途中省略）
protocols = imap pop3
（途中省略）

平文認証の有効化

view /etc/dovecot/conf.d/10-auth.conf

（途中省略）
disable_plaintext_auth = no
（途中省略）
auth_mechanisms = plain login
（途中省略）

メール保存先の指定

view /etc/dovecot/conf.d/10-mail.conf

（途中省略）
mail_location = maildir:~/Maildir
（途中省略）

PostfixでSMTP-AUTHを行うための設定

# Postfix smtp-auth
unix_listener /var/spool/postfix/private/auth {
  mode = 0666
  user = postfix
  group = postfix
}

Dovecotの起動

systemctl start dovecot

ss -an

（途中省略）
tcp   LISTEN     0      100                                     0.0.0.0:110 0.0.0.0:*
tcp   LISTEN     0      100                                     0.0.0.0:143 0.0.0.0:*
（途中省略）

Postfixの設定

view /etc/postfix/main.cf

（途中省略）
inet_interfaces = all
（途中省略）
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
（途中省略）
local_recipient_maps = unix:passwd.byname $alias_maps
（途中省略）
home_mailbox = Maildir/
（途中省略）
smtpd_banner = $myhostname ESMTP
（途中省略）
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions =
    permit_mynetworks,
    permit_sasl_authenticated,
    reject_unauth_destination

Postfixの設定確認

postfix check

Postfixの再起動

systemctl stop postfix
systemctl start postfix

以上です。お疲れ様でした！