【Linux】 CentOS7環境で自宅メールサーバーの構築（Postfix と Dovecot と OP25B問題）

# vi main.cf ←viコマンドを実行する。
# 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 = centos7.xxxxx.dix.asia　←メールサーバーのFQDNを指定。
# 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 = xxxxxx.dix.asia　←今回、MyDNSで取得したドメイン名を指定する。
# 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 = $mydomain　
↑メールアドレスの形式の指定。この場合、アカウントが apple01 だと、「apple01@xxxxxx.dix.asia」の形式になる。もし「$myhostname」だと「apple01@xxxxxx.dix.asia」になる。今回はテストなのでどっちでも良い。
# 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 = all　←利用するインターフェースを指定する。
# 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, $mydomain
↑どのドメイン宛のメールを受信するか指定する。今回は「xxxx@xxxxxx.dix.asia」宛のメールを受信するため「$mydomain」を追加する。
#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/
↑メールボックスの指定とメールボックスの場所の指定。今回のプログラムでは/Maildirでメール受信→Rubyプログラム実行の形式にするので「Maildir/」を指定する。

# The mail_spool_directory parameter specifies the directory where
# UNIX-style mailboxes are kept. The default setting depends on the
# system type.
#
#mail_spool_directory = /var/mail
#mail_spool_directory = /var/spool/mail

# The mailbox_command parameter specifies the optional external
# command to use instead of mailbox delivery. The command is run as
# the recipient with proper HOME, SHELL and LOGNAME environment settings.
# Exception:  delivery for root is done as $default_user.
#
# Other environment variables of interest: USER (recipient username),
# EXTENSION (address extension), DOMAIN (domain part of address),
# and LOCAL (the address localpart).
#
# Unlike other Postfix configuration parameters, the mailbox_command
# parameter is not subjected to $parameter substitutions. This is to
# make it easier to specify shell syntax (see example below).
#
# Avoid shell meta characters because they will force Postfix to run
# an expensive shell process. Procmail alone is expensive enough.
#
# IF YOU USE THIS TO DELIVER MAIL SYSTEM-WIDE, YOU MUST SET UP AN
# ALIAS THAT FORWARDS MAIL FOR ROOT TO A REAL USER.
#
#mailbox_command = /some/where/procmail
#mailbox_command = /some/where/procmail -a “$EXTENSION”

# The mailbox_transport specifies the optional transport in master.cf
# to use after processing aliases and .forward files. This parameter
# has precedence over the mailbox_command, fallback_transport and
# luser_relay parameters.
#
# Specify a string of the form transport:nexthop, where transport is
# the name of a mail delivery transport defined in master.cf.  The
# :nexthop part is optional. For more details see the sample transport
# configuration file.
#
# NOTE: if you use this feature for accounts not in the UNIX password
# file, then you must update the “local_recipient_maps” setting in
# the main.cf file, otherwise the SMTP server will reject mail for
# non-UNIX accounts with “User unknown in local recipient table”.
#
# Cyrus IMAP over LMTP. Specify “lmtpunix      cmd=”lmtpd”
# listen=”/var/imap/socket/lmtp” prefork=0” in cyrus.conf.
#mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp

# If using the cyrus-imapd IMAP server deliver local mail to the IMAP
# server using LMTP (Local Mail Transport Protocol), this is prefered
# over the older cyrus deliver program by setting the
# mailbox_transport as below:
#
# mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
#
# The efficiency of LMTP delivery for cyrus-imapd can be enhanced via
# these settings.
#
# local_destination_recipient_limit = 300
# local_destination_concurrency_limit = 5
#
# Of course you should adjust these settings as appropriate for the
# capacity of the hardware you are using. The recipient limit setting
# can be used to take advantage of the single instance message store
# capability of Cyrus. The concurrency limit can be used to control
# how many simultaneous LMTP sessions will be permitted to the Cyrus
# message store.
#
# Cyrus IMAP via command line. Uncomment the “cyrus…pipe” and
# subsequent line in master.cf.
#mailbox_transport = cyrus

# The fallback_transport specifies the optional transport in master.cf
# to use for recipients that are not found in the UNIX passwd database.
# This parameter has precedence over the luser_relay parameter.
#
# Specify a string of the form transport:nexthop, where transport is
# the name of a mail delivery transport defined in master.cf.  The
# :nexthop part is optional. For more details see the sample transport
# configuration file.
#
# NOTE: if you use this feature for accounts not in the UNIX password
# file, then you must update the “local_recipient_maps” setting in
# the main.cf file, otherwise the SMTP server will reject mail for
# non-UNIX accounts with “User unknown in local recipient table”.
#
#fallback_transport = lmtp:unix:/var/lib/imap/socket/lmtp
#fallback_transport =

# The luser_relay parameter specifies an optional destination address
# for unknown recipients.  By default, mail for unknown@$mydestination,
# unknown@[$inet_interfaces] or unknown@[$proxy_interfaces] is returned
# as undeliverable.
#
# The following expansions are done on luser_relay: $user (recipient
# username), $shell (recipient shell), $home (recipient home directory),
# $recipient (full recipient address), $extension (recipient address
# extension), $domain (recipient domain), $local (entire recipient
# localpart), $recipient_delimiter. Specify ${name?value} or
# ${name:value} to expand value only when $name does (does not) exist.
#
# luser_relay works only for the default Postfix local delivery agent.
#
# NOTE: if you use this feature for accounts not in the UNIX password
# file, then you must specify “local_recipient_maps =” (i.e. empty) in
# the main.cf file, otherwise the SMTP server will reject mail for
# non-UNIX accounts with “User unknown in local recipient table”.
#
#luser_relay = $user@other.host
#luser_relay = $local@other.host
#luser_relay = admin+$local

# JUNK MAIL CONTROLS
#
# The controls listed here are only a very small subset. The file
# SMTPD_ACCESS_README provides an overview.

# The header_checks parameter specifies an optional table with patterns
# that each logical message header is matched against, including
# headers that span multiple physical lines.
#
# By default, these patterns also apply to MIME headers and to the
# headers of attached messages. With older Postfix versions, MIME and
# attached message headers were treated as body text.
#
# For details, see “man header_checks”.
#
#header_checks = regexp:/etc/postfix/header_checks

# FAST ETRN SERVICE
#
# Postfix maintains per-destination logfiles with information about
# deferred mail, so that mail can be flushed quickly with the SMTP
# “ETRN domain.tld” command, or by executing “sendmail -qRdomain.tld”.
# See the ETRN_README document for a detailed description.
#
# The fast_flush_domains parameter controls what destinations are
# eligible for this service. By default, they are all domains that
# this server is willing to relay mail to.
#
#fast_flush_domains = $relay_domains

# 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)

# PARALLEL DELIVERY TO THE SAME DESTINATION
#
# How many parallel deliveries to the same user or domain? With local
# delivery, it does not make sense to do massively parallel delivery
# to the same user, because mailbox updates must happen sequentially,
# and expensive pipelines in .forward files can cause disasters when
# too many are run at the same time. With SMTP deliveries, 10
# simultaneous connections to the same domain could be sufficient to
# raise eyebrows.
#
# Each message delivery transport has its XXX_destination_concurrency_limit
# parameter.  The default is $default_destination_concurrency_limit for
# most delivery transports. For the local delivery agent the default is 2.

#local_destination_concurrency_limit = 2
#default_destination_concurrency_limit = 20

# DEBUGGING CONTROL
#
# The debug_peer_level parameter specifies the increment in verbose
# logging level when an SMTP client or server host name or address
# matches a pattern in the debug_peer_list parameter.
#
debug_peer_level = 2

# The debug_peer_list parameter specifies an optional list of domain
# or network patterns, /file/name patterns or type:name tables. When
# an SMTP client or server host name or address matches a pattern,
# increase the verbose logging level by the amount specified in the
# debug_peer_level parameter.
#
#debug_peer_list = 127.0.0.1
#debug_peer_list = some.domain

# The debugger_command specifies the external command that is executed
# when a Postfix daemon program is run with the -D option.
#
# Use “command .. & sleep 5” so that the debugger can attach before
# the process marches on. If you use an X-based debugger, be sure to
# set up your XAUTHORITY environment variable before starting Postfix.
#
debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         ddd $daemon_directory/$process_name $process_id & sleep 5

# If you can’t use X, use this to capture the call stack when a
# daemon crashes. The result is in a file in the configuration
# directory, and is named after the process name and the process ID.
#
# debugger_command =
#       PATH=/bin:/usr/bin:/usr/local/bin; export PATH; (echo cont;
#       echo where) | gdb $daemon_directory/$process_name $process_id 2>&1
#       >$config_directory/$process_name.$process_id.log & sleep 5
#
# Another possibility is to run gdb under a detached screen session.
# To attach to the screen sesssion, su root and run “screen -r
# <id_string>” where <id_string> uniquely matches one of the detached
# sessions (from “screen -list”).
#
# debugger_command =
#       PATH=/bin:/usr/bin:/sbin:/usr/sbin; export PATH; screen
#       -dmS $process_name gdb $daemon_directory/$process_name
#       $process_id & sleep 1

# INSTALL-TIME CONFIGURATION INFORMATION
#
# The following parameters are used when installing a new Postfix version.
#
# sendmail_path: The full pathname of the Postfix sendmail command.
# This is the Sendmail-compatible mail posting interface.
#
sendmail_path = /usr/sbin/sendmail.postfix

# newaliases_path: The full pathname of the Postfix newaliases command.
# This is the Sendmail-compatible command to build alias databases.
#
newaliases_path = /usr/bin/newaliases.postfix

# mailq_path: The full pathname of the Postfix mailq command.  This
# is the Sendmail-compatible mail queue listing command.
#
mailq_path = /usr/bin/mailq.postfix

# setgid_group: The group for mail submission and queue management
# commands.  This must be a group name with a numerical group ID that
# is not shared with other accounts, not even with the Postfix account.
#
setgid_group = postdrop

# html_directory: The location of the Postfix HTML documentation.
#
html_directory = no

# manpage_directory: The location of the Postfix on-line manual pages.
#
manpage_directory = /usr/share/man

# sample_directory: The location of the Postfix sample configuration files.
# This parameter is obsolete as of Postfix 2.1.
#
sample_directory = /usr/share/doc/postfix-2.10.1/samples

# readme_directory: The location of the Postfix README files.
#
readme_directory = /usr/share/doc/postfix-2.10.1/README_FILES

relayhost = [smtp.gmail.com]:587　←SMTP AUTH（SMTP認証）用の設定。Google の SMTP サーバーへリレーする。ポート番号は587番でOK。（TLS / STARTTLSを使って認証をするので「587番ポート」になる。もしSSLで認証する場合は「465番ポート」になる。※結構迷った。）
smtp_use_tls = yes　←TLS認証を利用する。
smtpd_tls_loglevel = 1　←tlsのログレベルを指定する。（デフォルトは0）
smtp_sasl_auth_enable = yes　←Postfix SMTPクライアントの SASL 認証を有効にする。デフォルトは、認証を利用しない。
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd　←smtp_sasl_password_mapsが記載されたファイル（/etc/postfix/sasl_passwd）を指定する。デフォルトは指定なし。リレー先サーバのアドレス（smtp.gmail.com）とポート番号（587）と認証で使用するユーザ名（Googleの認証を利用するので、xxxx@gmail.comになる）とパスワード（xxxx@gmail.comでGoogleにログインする時のパスワード）を記述したファイルを指定する。
smtp_sasl_tls_security_options = noanonymous　←匿名ユーザー（アノニマスユーザー）のログイン禁止　
smtp_sasl_security_options = noanonymous　←匿名ユーザー（アノニマスユーザー）のログイン禁止
smtp_sasl_mechanism_filter = plain
smtp_tls_CApath = /etc/pki/tls/certs/ca-bundle.crt

# systemctl restart postfix　←CentOS7なので、systemctlコマンドを実行。
# ←エラーが出力せずにプロンプトが返ってくればOK。CentOS6以前のように[OK][NG]が返ってくるスタイルの方が親切でよかったです。。
# systemctl status postfix　←念のためステータスを確認します。
● postfix.service – Postfix Mail Transport Agent　←これが緑色の●になっていればOK
   Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
   Active: active (running) since 日 2017-03-26 14:32:58 JST; 6s ago
  Process: 28615 ExecStop=/usr/sbin/postfix stop (code=exited, status=0/SUCCESS)
  Process: 28630 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS)
  Process: 28627 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)　←statusがSUCCESSになっていればOK
  Process: 28625 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
 Main PID: 28702 (master)
   CGroup: /system.slice/postfix.service
           tq28702 /usr/libexec/postfix/master -w
           tq28703 pickup -l -t unix -u
           mq28704 qmgr -l -t unix -u

# cat /etc/postfix/sasl_passwd
[smtp.gmail.com]:587 xxxxx@gmail.com:password

↑gmailで、SMTP認証を利用する場合は、587番ポートを指定する。xxxxx@gmail.comには、実際に利用しているリアルなgmailアドレスを入れる。:（コロン）を置いてxxxxx@gmail.comでログインする時に使うパスワードを記載する。

# postmap hash:/etc/postfix/sasl_passwd

#←エラーが出ずにプロンプトが返ってきたら正常終了。

# ls -l sasl_passwd*
-rw——- 1 root root    55  3月 28 00:45 sasl_passwd
-rw——- 1 root root 12288  3月 28 22:43 sasl_passwd.db　←データベースファイルができている。

#

# cp -ip /etc/postfix/master.cf /etc/postfix/master.cf_20170328

# vi /etc/postfix/master.cf

#
# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: “man 5 master”).
#
# Do not forget to execute “postfix reload” after editing this file.
#
# =======================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# =======================
smtp      inet  n       –       n       –       –       smtpd
#smtp      inet  n       –       n       –       1       postscreen
#smtpd     pass  –       –       n       –       –       smtpd
#dnsblog   unix  –       –       n       –       0       dnsblog
#tlsproxy  unix  –       –       n       –       0       tlsproxy
submission inet n       –       n       –       –       smtpd　←サブミッション用設定。コメントを外す。
#  -o syslog_name=postfix/submission
#  -o smtpd_tls_security_level=encrypt
  -o smtpd_sasl_auth_enable=yes　←SMTP認証を使う。コメントを外す。半角空白2つ隙間を開ける。（開けないとエラーになる。）
#  -o smtpd_reject_unlisted_recipient=no
#  -o smtpd_client_restrictions=$mua_client_restrictions
#  -o smtpd_helo_restrictions=$mua_helo_restrictions
#  -o smtpd_sender_restrictions=$mua_sender_restrictions
  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject　←コメントを外す。
#  -o milter_macro_daemon_name=ORIGINATING
#smtps     inet  n       –       n       –       –       smtpd
#  -o syslog_name=postfix/smtps
#  -o smtpd_tls_wrappermode=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_reject_unlisted_recipient=no
#  -o smtpd_client_restrictions=$mua_client_restrictions
#  -o smtpd_helo_restrictions=$mua_helo_restrictions
#  -o smtpd_sender_restrictions=$mua_sender_restrictions
#  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
#628       inet  n       –       n       –       –       qmqpd
pickup    unix  n       –       n       60      1       pickup
cleanup   unix  n       –       n       –       0       cleanup
qmgr      unix  n       –       n       300     1       qmgr
#qmgr     unix  n       –       n       300     1       oqmgr
tlsmgr    unix  –       –       n       1000?   1       tlsmgr
rewrite   unix  –       –       n       –       –       trivial-rewrite
bounce    unix  –       –       n       –       0       bounce
defer     unix  –       –       n       –       0       bounce
trace     unix  –       –       n       –       0       bounce
verify    unix  –       –       n       –       1       verify
flush     unix  n       –       n       1000?   0       flush
proxymap  unix  –       –       n       –       –       proxymap
proxywrite unix –       –       n       –       1       proxymap
smtp      unix  –       –       n       –       –       smtp
relay     unix  –       –       n       –       –       smtp
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       –       n       –       –       showq
error     unix  –       –       n       –       –       error
retry     unix  –       –       n       –       –       error
discard   unix  –       –       n       –       –       discard
local     unix  –       n       n       –       –       local
virtual   unix  –       n       n       –       –       virtual
lmtp      unix  –       –       n       –       –       lmtp
anvil     unix  –       –       n       –       1       anvil
scache    unix  –       –       n       –       1       scache
#
# =======================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent.  See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# =======================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
#maildrop  unix  –       n       n       –       –       pipe
#  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
#
# =======================
#
# Recent Cyrus versions can use the existing “lmtp” master.cf entry.
#
# Specify in cyrus.conf:
#   lmtp    cmd=”lmtpd -a” listen=”localhost:lmtp” proto=tcp4
#
# Specify in main.cf one or more of the following:
#  mailbox_transport = lmtp:inet:localhost
#  virtual_transport = lmtp:inet:localhost
#
# =======================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus     unix  –       n       n       –       –       pipe
#  user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
#
# =======================
#
# Old example of delivery via Cyrus.
#
#old-cyrus unix  –       n       n       –       –       pipe
#  flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
#
# =======================
#
# See the Postfix UUCP_README file for configuration details.
#
#uucp      unix  –       n       n       –       –       pipe
#  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender – $nexthop!rmail ($recipient)
#
# =======================
#
# Other external delivery methods.
#
#ifmail    unix  –       n       n       –       –       pipe
#  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
#
#bsmtp     unix  –       n       n       –       –       pipe
#  flags=Fq. user=bsmtp argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
#
#scalemail-backend unix –       n       n       –       2       pipe
#  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store
#  ${nexthop} ${user} ${extension}
#
#mailman   unix  –       n       n       –       –       pipe
#  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
#  ${nexthop} ${user}

# systemctl restart postfix　←postfixの再起動

# systemctl status postfix　←postfixの再起動後のステータス確認

# systemctl restart saslauthd　←saslauthdの再起動

# systemctl status saslauthd　←saslauthdの再起動後のステータス確認

# echo “テスト本文” | mail -s “テストタイトル” xxxx@gmail.com　←たまたまgmailへメールを送りましたが、プロバイダメールでもなんでもいいです。（一旦インターネットに出れば）

Mar 28 22:26:28 centos7 postfix/pickup[3211]: 0D83A2101789: uid=0 from=<root>
Mar 28 22:26:28 centos7 postfix/cleanup[4453]: 0D83A2101789: message-id=<20170328132628.0D83A2101789@centos7.xxxxx.dix.asia>
Mar 28 22:26:28 centos7 postfix/qmgr[2026]: 0D83A2101789: from=<root@xxxxx.dix.asia>, size=493, nrcpt=1 (queue active)　←root@xxxxx.dix.asiaからメール送信
Mar 28 22:26:28 centos7 postfix/smtp[4455]: warning: database /etc/postfix/sasl_passwd.db is older than source file /etc/postfix/sasl_passwd
Mar 28 22:26:30 centos7 postfix/smtp[4455]: 0D83A2101789: to=<xxxxx@gmail.com>, relay=smtp.gmail.com[64.233.189.109]:587, delay=2.3, delays=0.37/0.03/1.1/0.85, dsn=2.0.0, status=sent (250 2.0.0 OK 1490707589 e5sm7695309pga.13 – gsmtp)　←Gmailの「xxxxx@gmail.com」宛にメールを送信。メールリレーはgmailのメールサーバー「smtp.gmail.com[64.233.189.109]」が行う。「status=sent」なので正常にメールが送信できている。
Mar 28 22:26:30 centos7 postfix/qmgr[2026]: 0D83A2101789: removed

# cd /etc/dovecot/conf.d
# cp -ip 10-mail.conf 10-mail.conf_YYYYMMDD　←例のごとく設定前にバックアップを取っておく。
# vi 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 = maildr:~/Maildir　←Maildirを指定する。

$ pwd 
/home/xxxxx/Maildir/cur 
 
$ ls -l 
-rw——- 1 xxxx xxxx 1121  3月 28 23:38 1490711903.Vfd02I8000995M620592.centos7.xxxxx.dix.asia:2,S ←メールを送信したタイミングで受信している。 
 
$ cat 1490711903.Vfd02I8000995M620592.centos7.xxxxx.dix.asia:2,S 
 
Return-Path: <xxxxx@xxxxx.dix.asia> 
X-Original-To: xxxx@xxxxxx.dix.asia 
Delivered-To: xxxx@xxxxxx.dix.asia 
Received: from [192.168.1.4] (unknown [192.168.1.4]) 
        by centos7.xxxxx.dix.asia (Postfix) with ESMTPA id 7FD89210178F 
        for <xxxx@xxxxxx.dix.asia>; Tue, 28 Mar 2017 23:38:23 +0900 (JST) 
Subject: =?UTF-8?B?UmU6IOODhuOCueODiOOCv+OCpOODiOODqw==?= 
To: “xxxx@xxxxxx.dix.asia” <xxxx@xxxxxx.dix.asia> 
References: <20170328132116.1C5A32101789@centos7.xxxxx.dix.asia> 
 <81706fb2-e08f-db9b-100c-48327f10f750@xxxxx.dix.asia> 
From: “xxxx@xxxxxx.dix.asia” <xxxx@xxxxxx.dix.asia> 
Message-ID: <f2f344e2-9894-5212-3e81-963ce12ed6f3@xxxxx.dix.asia> 
Date: Tue, 28 Mar 2017 23:38:27 +0900 
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 
 Thunderbird/45.8.0 
MIME-Version: 1.0 
In-Reply-To: <81706fb2-e08f-db9b-100c-48327f10f750@xxxxx.dix.asia> 
Content-Type: text/plain; charset=utf-8; format=flowed 
Content-Transfer-Encoding: 8bit 
 
 
 
On 2017/03/28 23:37, xxxx@xxxxxx.dix.asia wrote: 
> 
> 
> On 2017/03/28 22:21, xxxx@xxxxxx.dix.asia wrote: 
>> テストメール本文 
>> 
>

Mar 28 23:38:23 centos7 postfix/smtpd[5068]: connect from unknown[192.168.1.4]
Mar 28 23:38:23 centos7 postfix/smtpd[5068]: 7FD89210178F: client=unknown[192.168.1.4], sasl_method=PLAIN, sasl_username=xxxx
Mar 28 23:38:23 centos7 postfix/cleanup[5071]: 7FD89210178F: message-id=<f2f344e2-9894-5212-3e81-963ce12ed6f3@xxxxx.dix.asia>
Mar 28 23:38:23 centos7 postfix/qmgr[2026]: 7FD89210178F: from=<xxxxx@xxxxx.dix.asia>, size=1032, nrcpt=1 (queue active)
Mar 28 23:38:23 centos7 postfix/smtpd[5068]: disconnect from unknown[192.168.1.4]
Mar 28 23:38:23 centos7 postfix/local[5072]: 7FD89210178F: to=<xxxxx@xxxxx.dix.asia>, relay=local, delay=0.18, delays=0.13/0/0/0.05, dsn=2.0.0, status=sent (delivered to maildir)　←「status=sent」になっていることを確認
Mar 28 23:38:23 centos7 postfix/qmgr[2026]: 7FD89210178F: removed

# echo “テストメール本文” | mail -s “テストタイトル” xxxxx@xxxxx.dix.asia
↑自分から自分あてにメールを送信

Mar 28 23:49:28 centos7 dovecot: pop3-login: Login: user=<xxxx>, method=PLAIN, rip=192.168.1.4, lip=192.168.1.10, mpid=5187, TLS, session=<3WQZkctLJQDAqAEE>
Mar 28 23:49:28 centos7 dovecot: pop3(xxxxx): Disconnected: Logged out top=0/0, retr=0/0, del=0/7, size=6662
Mar 28 23:55:46 centos7 postfix/pickup[4580]: BDA6F210178F: uid=1001 from=<xxxxxx>
Mar 28 23:55:46 centos7 postfix/cleanup[5249]: BDA6F210178F: message-id=<20170328145546.BDA6F210178F@centos7.xxxxx.dix.asia>
Mar 28 23:55:46 centos7 postfix/qmgr[2026]: BDA6F210178F: from=<xxxxx@xxxxx.dix.asia>, size=503, nrcpt=1 (queue active)
Mar 28 23:55:46 centos7 postfix/local[5251]: BDA6F210178F: to=<xxxxx@xxxxx.dix.asia>, relay=local, delay=0.44, delays=0.38/0.02/0/0.04, dsn=2.0.0, status=sent (delivered to maildir)　←自分から自分あてに「status=sent」でメールが送られていることを確認。
Mar 28 23:55:46 centos7 postfix/qmgr[2026]: BDA6F210178F: removed