メールサーバを小リニューアル

メールサーバの機能を部分的に更新した。
これまでMailbox形式だった物をMaildir形式のものに変え、
POP3だったものをIMAP4にした程度だが。
……あ、qpopperをやめてdovecotにしたなそういえば。

というわけで、1ヶ月ぶりの更新はここから始めようと思う。
うーん、記事を書く時間を割く努力をもっとしなければ。
さて、まずはMaildir形式への移行方法から。
……と言っても、postfixを導入している当サーバでは非常に簡単だ。/usr/local/etc/postfix/main.cfの……

home_mailbox = Mailbox

を

home_mailbox = Maildir/

に変えて終了。あとはpostfixをreloadすれば、新しくメールが配送された際に
宛先のホームディレクトリ直下にMaildirが作成される。

次。dovecotの導入……だが、別段vpopmailに対応させなければならないわけでなし、
暗号化にナーバスになるでもないのでこちらも作業は至って簡単だ。

# cd /usr/ports/mail/dovecot
# make config

(IPv6とLDAを使用しないように指定)

# make install clean
# cp -p /usr/local/etc/dovecot-example.conf /usr/local/etc/dovecot.conf

インストールを行い、設定ファイルをデフォルトからコピーした上で書き換える。

--- /usr/local/etc/dovecot.conf Fri Mar 21 15:05:22 2008
+++ /usr/local/etc/dovecot-example.conf Fri Mar 21 14:55:16 2008
@@ -47,7 +47,6 @@
 # matches the local IP (ie. you're connecting from the same computer), the
 # connection is considered secure and plaintext authentication is allowed.
 #disable_plaintext_auth = yes
-disable_plaintext_auth = no

 # Should all IMAP and POP3 processes be killed when Dovecot master process
 # shuts down. Setting this to "no" means that Dovecot can be upgraded without
@@ -76,7 +75,7 @@
 # Syslog facility to use if you're logging to syslog. Usually if you don't
 # want to use "mail", you'll use local0..local7. Also other standard
 # facilities are supported.
-syslog_facility = local0
+#syslog_facility = mail

 ##
 ## SSL settings
@@ -88,7 +87,6 @@

 # Disable SSL/TLS support.
 #ssl_disable = no
-ssl_disable = yes

 # 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
@@ -142,7 +140,6 @@
 # only it has access, it's used to control access for authentication process.
 # Note that this user is NOT used to access mails. <doc/wiki/UserIds.txt>
 #login_user = dovecot
-login_user = dovecot

 # Set max. process size in megabytes. If you don't use
 # login_process_per_connection you might need to grow this.
@@ -174,7 +171,6 @@

 # Greeting message for clients.
 #login_greeting = Dovecot ready.
-login_greeting = POP-Server Ready.

 # Space-separated list of elements we want to log. The elements which have
 # a non-empty variable value are joined together to form a comma-separated
@@ -215,8 +211,7 @@
 # <doc/wiki/MailLocation.txt>
 #
 #mail_location =
-#mail_location = mbox:~/mail/:INBOX=/var/mail/%u
-mail_location = maildir:~/Maildir
+mail_location = mbox:~/mail/:INBOX=/var/mail/%u

 # If you need to set multiple mailbox locations or want to change default
 # namespace settings, you can do it by defining namespace sections.
@@ -336,18 +331,14 @@
 # be done even if first_valid_uid is set to 0.
 #first_valid_uid = 500
 #last_valid_uid = 0
-first_valid_uid = 1001
-last_valid_uid = 2000

 # Valid GID range for users, defaults to non-root/wheel. Users having
 # non-valid GID as primary group ID aren't allowed to log in. If user
 # belongs to supplementary groups with non-valid GIDs, those groups are
 # not set.
 #first_valid_gid = 1
-#first_valid_gid = 0
+first_valid_gid = 0
 #last_valid_gid = 0
-first_valid_gid = 1001
-last_valid_gid = 2000

 # Maximum number of running mail processes. When this limit is reached,
 # new users aren't allowed to log in.
@@ -596,21 +587,17 @@
   # mostly intended to reduce disk I/O. With maildir it doesn't move files
   # from new/ to cur/, with mbox it doesn't write Status-header.
   #pop3_no_flag_updates = no
-  pop3_no_flag_updates = no

   # Support LAST command which exists in old POP3 specs, but has been removed
   # from new ones. Some clients still wish to use this though. Enabling this
   # makes RSET command clear all \Seen flags from messages.
   #pop3_enable_last = no
-  pop3_enable_last = no

   # If mail has X-UIDL header, use it as the mail's UIDL.
   #pop3_reuse_xuidl = no
-  pop3_reuse_xuidl = no

   # Keep the mailbox locked for the entire POP3 session.
   #pop3_lock_session = no
-  pop3_lock_session = no

   # POP3 UIDL (unique mail identifier) format to use. You can use following
   # variables:
@@ -651,14 +638,11 @@
   #  %m - number of messages (before deletion)
   #  %s - mailbox size in bytes (before deletion)
   #pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
-  pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s

   # Workarounds for various client bugs:
   #   outlook-no-nuls:
@@ -676,26 +660,26 @@
 ## LDA specific settings
 ##

-#protocol lda {
-#  # Address to use when sending rejection mails.
-#  postmaster_address = postmaster@example.com
-#
-#  # Hostname to use in various parts of sent mails, eg. in Message-Id.
-#  # Default is the system's real hostname.
-#  #hostname =
-#
-#  # Support for dynamically loadable plugins. mail_plugins is a space separated
-#  # list of plugins to load.
-#  #mail_plugins =
-#  #mail_plugin_dir = /usr/local/lib/dovecot/lda
-#
-#  # Binary to use for sending mails.
-#  #sendmail_path = /usr/lib/sendmail
-#  sendmail_path = /usr/sbin/sendmail
-#
-#  # UNIX socket path to master authentication server to find users.
-#  #auth_socket_path = /var/run/dovecot/auth-master
-#}
+protocol lda {
+  # Address to use when sending rejection mails.
+  postmaster_address = postmaster@example.com
+
+  # Hostname to use in various parts of sent mails, eg. in Message-Id.
+  # Default is the system's real hostname.
+  #hostname =
+
+  # Support for dynamically loadable plugins. mail_plugins is a space separated
+  # list of plugins to load.
+  #mail_plugins =
+  #mail_plugin_dir = /usr/local/lib/dovecot/lda
+
+  # Binary to use for sending mails.
+  #sendmail_path = /usr/lib/sendmail
+  sendmail_path = /usr/sbin/sendmail
+
+  # UNIX socket path to master authentication server to find users.
+  #auth_socket_path = /var/run/dovecot/auth-master
+}

 # Username formatting before it's looked up from databases. You can use
 # the standard variables here, eg. %Lu would lowercase the username, %n would
@@ -858,10 +840,10 @@
   # System users (NSS, /etc/passwd, or similiar)
   # In many systems nowadays this uses Name Service Switch, which is
   # configured in /etc/nsswitch.conf. <doc/wiki/AuthDatabase.Passwd.txt>
-  passdb passwd {
+  #passdb passwd {
     # [blocking=yes] - See userdb passwd for explanation
     #args =
-  }
+  #}

   # Shadow passwords for system users (NSS, /etc/shadow or similiar).
   # Deprecated by PAM nowadays.

こんな感じ。長くなり過ぎたかな？あとは自動起動の設定を施して終了。