$ vi /etc/postfix/main.cf
# INTERNET HOST AND DOMAIN NAMES
#
# The myhostname parameter specifies the internet hostname of this
# mail system. The default is to use the fully-qualified domain name
# from gethostname(). $myhostname is used as a default value for many
# other configuration parameters.
#
#myhostname = host.domain.tld
#myhostname = virtual.domain.tld
myhostname = mail.bobo.com #追加（FQDN名を設定）
# The mydomain parameter specifies the local internet domain name.
# The default is to use $myhostname minus the first component.
# $mydomain is used as a default value for many other configuration
# parameters.
#
#mydomain = domain.tld
mydomain = bobo.com #追加（自ドメイン名を設定）
# SENDING MAIL
#
# The myorigin parameter specifies the domain that locally-posted
# mail appears to come from. The default is to append $myhostname,
# which is fine for small sites. If you run a domain with multiple
# machines, you should (1) change this to $mydomain and (2) set up
# a domain-wide alias database that aliases each user to
# user@that.users.mailhost.
#
# For the sake of consistency between sender and recipient addresses,
# myorigin also specifies the default domain name that is appended
# to recipient addresses that have no @domain part.
#
#myorigin = $myhostname
#myorigin = $mydomain
myorigin = $mydomain #追加（ローカルのメール送信元メールアドレス@以降にドメイン名付与）
# RECEIVING MAIL
# The inet_interfaces parameter specifies the network interface
# addresses that this mail system receives mail on. By default,
# the software claims all active interfaces on the machine. The
# parameter also controls delivery of mail to user@[ip.address].
#
# See also the proxy_interfaces parameter, for network addresses that
# are forwarded to us via a proxy or network address translator.
#
# Note: you need to stop/start Postfix when this parameter changes.
#
#inet_interfaces = all
#inet_interfaces = $myhostname
#inet_interfaces = $myhostname, localhost
#inet_interfaces = localhost
inet_interfaces = all # 変更（外部からのメール受信を許可）
# The mydestination parameter specifies the list of domains that this
# machine considers itself the final destination for.
#
# These domains are routed to the delivery agent specified with the
# local_transport parameter setting. By default, that is the UNIX
# compatible delivery agent that lookups all recipients in /etc/passwd
# and /etc/aliases or their equivalent.
#
# The default is $myhostname + localhost.$mydomain. On a mail domain
# gateway, you should also include $mydomain.
#
# Do not specify the names of virtual domains - those domains are
# specified elsewhere (see VIRTUAL_README).
#
# Do not specify the names of domains that this machine is backup MX
# host for. Specify those names via the relay_domains settings for
# the SMTP server, or use permit_mx_backup if you are lazy (see
# STANDARD_CONFIGURATION_README).
#
# The local machine is always the final destination for mail addressed
# to user@[the.net.work.address] of an interface that the mail system
# receives mail on (see the inet_interfaces parameter).
#
# Specify a list of host or domain names, /file/name or type:table
# patterns, separated by commas and/or whitespace. A /file/name
# pattern is replaced by its contents; a type:table is matched when
# a name matches a lookup key (the right-hand side is ignored).
# Continue long lines by starting the next line with whitespace.
#
# See also below, section "REJECTING MAIL FOR UNKNOWN LOCAL USERS".
#
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain #変更（自ドメイン宛メールを受信できるようにする）
#mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
#mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
# mail.$mydomain, www.$mydomain, ftp.$mydomain
# DELIVERY TO MAILBOX
#
# The home_mailbox parameter specifies the optional pathname of a
# mailbox file relative to a user's home directory. The default
# mailbox file is /var/spool/mail/user or /var/mail/user. Specify
# "Maildir/" for qmail-style delivery (the / is required).
#
#home_mailbox = Mailbox
#home_mailbox = Maildir/
home_mailbox = Maildir/ #追加（メールボックス形式をMaildir形式にする）
# SHOW SOFTWARE VERSION OR NOT
#
# The smtpd_banner parameter specifies the text that follows the 220
# code in the SMTP server's greeting banner. Some people like to see
# the mail version advertised. By default, Postfix shows no version.
#
# You MUST specify $myhostname at the start of the text. That is an
# RFC requirement. Postfix itself does not care.
#
#smtpd_banner = $myhostname ESMTP $mail_name
#smtpd_banner = $myhostname ESMTP $mail_name ($mail_version)
smtpd_banner = $myhostname ESMTP unknown #追加（メールサーバソフト名の隠蔽）
以下を最終行へ追加
#追加設定（SMTP-Auth設定）
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_recipient_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
#追加設定（受信メールサイズ制限）
message_size_limit = 10485760 #追加（受信メールサイズを10MB=10*1024*1024に制限）
SMTP-Auth設定
SMTP-Authにてユーザー名、パスワードにシステムのユーザ名、パスワードを使用する場合
$ service saslauthd start #saslauthdを起動
saslauthd を起動中: [ OK ]
$ chkconfig saslauthd on #saslauthdを自動起動する設定
$ less /etc/dovecot/conf.d/10-mail.conf
##
## Mailbox locations and namespaces
##
# Location for users' mailboxes. The default is empty, which means that Dovecot
# tries to find the mailboxes automatically. This won't work if the user
# doesn't yet have any mail, so you should explicitly tell Dovecot the full
# location.
#
# If you're using mbox, giving a path to the INBOX file (eg. /var/mail/%u)
# isn't enough. You'll also need to tell Dovecot where the other mailboxes are
# kept. This is called the "root mail directory", and it must be the first
# path given in the mail_location setting.
#
# There are a few special variables you can use, eg.:
#
# %u - username
# %n - user part in user@domain, same as %u if there's no domain
# %d - domain part in user@domain, empty if there's no domain
# %h - home directory
#
# See doc/wiki/Variables.txt for full list. Some examples:
#
# mail_location = maildir:~/Maildir
# mail_location = mbox:~/mail:INBOX=/var/mail/%u
# mail_location = mbox:/var/mail/%d/%1n/%n:INDEX=/var/indexes/%d/%1n/%n
#
# <doc/wiki/MailLocation.txt>
#
#mail_location =
mail_location = maildir:~/Maildir #メールボックス形式⇒メールディレクトリ形式とする
～～～～～～～中略
# ':' separated list of directories under which chrooting is allowed for mail
# processes (ie. /var/mail will allow chrooting to /var/mail/foo/bar too).
# This setting doesn't affect login_chroot, mail_chroot or auth chroot
# settings. If this setting is empty, "/./" in home dirs are ignored.
# WARNING: Never add directories here which local users can modify, that
# 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 #OpenSSH + Chrootを導入時に設定
$ vi /etc/dovecot/conf.d/10-auth.conf
##
## Authentication processes
##
# Disable LOGIN command and all other plaintext authentications unless
# SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP
# 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 #プレーンテキスト認証を許可する
$ telnet localhost 25 #SMTPでアクセス
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 mail.bobo.com ESMTP unknown
HELO bobo.com #アクセス成功
502 5.5.2 Error: command not recognized
MAIL FROM: bobo@bobo.com #送り元メールアドレス
250 2.1.0 Ok
RCPT TO: bobo@bobo.com #RCPT TO検証
250 2.1.5 Ok
DATA #ここからメールの内容を記載
354 End data with .
From: bobo@bobo.com #宛先メールアドレス
Subject: test #件名
Hello wrold. #ここからメールの内容↓
test
test
test
test
. #終了（ピリオド）
250 2.0.0 Ok: queued as 576F6245A
QUIT #メール終了（送信）
221 2.0.0 Bye
Connection closed by foreign host.
$
ログで正常にメールを送信できたことを確認。
$ less /var/log/maillog
Jan 10 17:51:19 t-bobo011 postfix/smtpd[24686]: connect from localhost[::1]
Jan 10 17:51:55 t-bobo011 postfix/smtpd[24686]: 576F6245A: client=localhost[::1]
Jan 10 17:52:50 t-bobo011 postfix/cleanup[24691]: 576F6245A: message-id=<20140110085155.576F6245A@mail.bobo.com>
Jan 10 17:52:50 t-bobo011 postfix/qmgr[12693]: 576F6245A: from=<bobo@bobo.com>, size=369, nrcpt=1 (queue active)
Jan 10 17:52:50 t-bobo011 postfix/local[24694]: 576F6245A: to=<bobo@bobo.com>, relay=local, delay=69, delays=69/0.01/0/0.01, dsn=2.0.0, status=sent (delivered to maildir)
Jan 10 17:52:50 t-bobo011 postfix/qmgr[12693]: 576F6245A: removed
受信メール確認
$ telnet localhost 110 #POP3でアクセス
Trying ::1...
Connected to localhost.
Escape character is '^]'.
+OK Dovecot ready.
USER bobo #ユーザー入力
+OK
PASS cocobat5555 #ユーザーパスワード入力
+OK Logged in.
LIST #メッセージリスト確認
+OK 5 messages:
1 422
2 455
3 429
4 322
5 458
.
RETR 5 #5番目のメッセージを確認
+OK 458 octets
Return-Path: <bobo@bobo.com>
X-Original-To: bobo@bobo.com
Delivered-To: bobo@bobo.com
Received: from localhost (localhost [IPv6:::1])
by mail.bobo.com (Postfix) with SMTP id 576F6245A
for <bobo@bobo.com>; Fri, 10 Jan 2014 17:51:41 +0900 (JST)
From: bobo@bobo.com
Subject: test
Message-Id: <20140110085155.576F6245A@mail.bobo.com>
Date: Fri, 10 Jan 2014 17:51:41 +0900 (JST)
To: undisclosed-recipients:;
Hello wrold.
test
test
test
test
.
QUIT #終了
+OK Logging out.
Connection closed by foreign host.
$
ログで正常にメールを受信できたことを確認。
$ less /var/log/maillog
Jan 10 17:58:29 t-bobo011 dovecot: pop3-login: Login: user=, method=PLAIN, rip=::1, lip=::1, mpid=24714, secured
Jan 10 17:59:05 t-bobo011 dovecot: pop3(bobo): Disconnected: Logged out top=0/0, retr=1/474, del=0/5, size=2086
をチェック
エンジニア必見！ 技術力を伸ばすVPS徹底比較
>>>
コメント
コメント一覧 （6件）
送信メール確認部分で”HELLO bobo.com”
-> “HELO bobo.com”ではないでしょうか？
502 5.5.2 Error: command not recognized
となってしまっています
ご指摘ありがとうございます。
修正いたしました。
まだまだですね。私も。。。
ありがとうございます！
メールサーバの勉強をしているので参考にさせて頂いております
いえ。こちらもまだまだ勉強中なので。
お役に立てれてうれしく思います！
参考にさせていただきました！
対象ファイルを設定（10-auth.conf）で
disable_planetext_auth = no #プレーンテキスト認証を許可する
の綴りが間違っています。
planetextではなく、plaintextで起動することができました。
ご指摘ありがとうございます！「plaintext」に変更しました！
また、参考にしていただきありがとうございます！