郵件服務器postfix+dovecot+mysql

阿新 • • 發佈：2018-07-04

root con 域名 extern ech edi 概覽 value detail

1.前期準備

1.1設置hostname

CentOS7,可以通過hostnamectl set-hostname hostname命令設置hostname,並且修改hosts文件.這裏域名是sijibao.info.

hostnamectl set-hostname mail.sijibao.info

為什麽要設置hostname呢?因為一般情況下,Postfix在與其他的SMTP服務器進行通信的時候,會使用hostname來表名自己的身份.
主機名有兩種形式,單名字與FQDN(Fully Qualified Domain Name).如果SMTP服務器不是用FQDN來表明身份,則有可能會被拒收.

1.2修改防火墻開放端口

修改防火墻開發相應的端口,分別是25, 465, 587, 110, 995, 143, 993.

1.3域名解析配置

MX       mail       sijibao.info
A        mail       ip

2.安裝Postfix, Dovecot以及數據庫

2.1首先更新系統

yum update -y.
把系統的一些組件更新到最新,然後需要修改一些CentOS的源設置.
因為CentOS默認源裏面的Postfix默認是不能和MariaDB協同工作的,因而我們需要安裝擴展源裏面的Postfix.

修改: /etc/yum.repos.d/CentOS-Base.repo
[base]
name=CentOS-$releasever - Base
exclude=postfix
#released updates
[updates]
name=CentOS-$releasever - Updates
exclude=postfix
修改完畢以後,我們讓擴展源生效,並且安裝我們所需要的應用以及服務.

2.2 yum 安裝

yum --enablerepo=centosplus install postfix
yum install dovecot mariadb-server dovecot-mysql

2.3數據庫概覽

創建mail數據庫用以處理郵件相關的業務.並且創建郵件管理員.


GRANT SELECT, INSERT, UPDATE, DELETE ON mail.* TO ‘mail_admin‘@‘%‘ IDENTIFIED BY ‘mys123456‘;
FLUSH PRIVILEGES;

mail數據庫中一共有3個表,分別是虛擬域名, 用戶信息, 郵件轉發.

CREATE TABLE `domains` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(50) NOT NULL,
PRIMARY KEY (`id`)
);

CREATE TABLE `users` (
`id` int(11) NOT NULL auto_increment,
`domain_id` int(11) NOT NULL,
`password` varchar(106) NOT NULL,
`email` varchar(100) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `email` (`email`),
FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
);

CREATE TABLE `aliases` (
`id` INT NOT NULL AUTO_INCREMENT,
`domain_id` INT NOT NULL,
`source` varchar(100) NOT NULL,
`destination` varchar(100) NOT NULL,
PRIMARY KEY (`id`),
FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
);

在虛擬域名表中插入域名

INSERT INTO `mail`.`domains`
(`id` ,`name`)
VALUES
(‘1‘, ‘sijibao.info‘),
(‘2‘, ‘localhost.sijibao.info‘);

在用戶信息表中插入用戶

INSERT INTO `mail`.`users`
(`id`, `domain_id`, `password` , `email`)
VALUES
(‘1‘, ‘1‘, ENCRYPT(‘123123‘), ‘[email protected]‘),
(‘2‘, ‘1‘, ENCRYPT(‘123123‘), ‘[email protected]‘);

設置別名

INSERT INTO `mail`.`aliases`
(`id`, `domain_id`, `source`, `destination`)
VALUES
(‘1‘, ‘1‘, ‘[email protected]‘, ‘[email protected]‘),
(‘2‘, ‘1‘, ‘[email protected]‘, ‘[email protected]‘);

檢查是否有數據

SELECT * FROM mail.domains;
SELECT * FROM mail.users;
SELECT * FROM mail.aliases;

3.配置Postfix

        master： /etc/postfix/master.cf   (主進程的配置文件)
        mail：   /etc/postfix/main.cf    （功能性配置文件）
表示方法：參數 = 值   （參數定格寫在行首，以空白開頭的行認為是上一行的延續）

3.1 postfix模塊化配置：

先備份源文件

cp /etc/postfix/main.cf /etc/postfix/main.cf.org

更改配置(默認的不用動)
vi /etc/postfix/main.cf
myhostname = mail.sijibao.info
mydestination = localhost, localhost.localdomain
mynetworks = 127.0.0.0/8            
inet_interfaces = all               
message_size_limit = 30720000         
relayhost =                     
alias_maps = hash:/etc/aliases          

smtpd_tls_key_file = /etc/pki/dovecot/private/dovecot.pem   
smtpd_tls_cert_file = /etc/pki/dovecot/certs/dovecot.pem
smtpd_use_tls=yes
smtpd_tls_auth_only = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes 
smtpd_recipient_restrictions =permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination

virtual_transport = dovecot
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,mysql:/etc/postfix/mysql-virtual-email2email.cf

3.2 postfix配置文件解釋：

mydomain參數是指email服務器的域名，請確保為正式域名（如sijibao.info）
myhostname參數是指系統的主機名稱（如我的服務器主機名稱是mail.sijibao.info）
myorigin參數指定本地發送郵件中來源和傳遞顯示的域名。
myorigin = $mydomain 設置由本機寄出的郵件所使用的域名或主機名稱
mynetworks參數指定受信任SMTP的列表，具體的說，受信任的SMTP客戶端允許通過Postfix傳遞郵件。0.0.0.0/0 #配置這一項使用用戶可在任意地發送郵件 
mydestination參數指定哪些郵件地址允許在本地發送郵件。這是一組被信任的允許通過服務器發送或傳遞郵件的IP地址。
用戶試圖通過發送從此處未列出的IP地址的原始服務器的郵件將被拒絕。
inet_interfaces參數設置網絡接口以便Postfix能接收到郵件。
relay_domains:該參數是系統傳遞郵件的目的域名列表。如果留空，我們保證了我們的郵件服務器不對不信任的網絡開放。
home_mailbox:該參數設置郵箱路徑與用戶目錄有關，也可以指定要使用的郵箱風格。 
message_size_limit = 52428800 ###限制附件大小 
mailbox_size_limit = 209715200 ###容量大小 
註意：默認postfix從mydestination和virtual_mailbox_domains兩個參數來確定postfix需要接收哪些域的郵件。
如果接收的郵件域與mydestination匹配，則使用系統帳號處理郵件；
如果接收的郵件域與virtual_mailbox_domains匹配則使用虛擬帳號處理郵件。
alias_maps = hash:/etc/aliases   在具有NIS的系統上，缺省值是搜索本地別名數據庫，然後搜索NIS別名數據庫。
不設置會有 warning: dict_nis_init: NIS domain name not set - NIS lookups disabled

smtpd_tls_key_file = /etc/pki/dovecot/private/dovecot.pem   你希望使用自己的SSL證書,私鑰路徑，則把/etc/pki/dovecot/private/dovecot.pem替換成你的證書路徑.
smtpd_tls_cert_file = /etc/pki/dovecot/certs/dovecot.pem    你希望使用自己的SSL證書，公鑰路徑,則把/etc/pki/dovecot/certs/dovecot.pem替換成你的證書路徑.
smtpd_sasl_auth_enable = yes     //使用SMTP認證  
smtpd_sasl_security_options = noanonymous //取消匿名登陸方式 
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination //設定郵件中有關收件人部分的限制  
smtpd_sasl_type = dovecot smtp使用dovecot驗證
smtpd_use_tls=yes     向遠程SMTP客戶端宣布STARTTLS支持，但不要求客戶端使用TLS加密
smtpd_tls_auth_only = yes  當Postfix SMTP服務器中的TLS加密是可選的時，請勿通過未加密的連接通告或接受SASL認證。

virtual_transport = dovecot 以dovecot 默認郵件傳遞傳輸和下一跳的目標
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf  /讀取數據庫虛擬域 
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf     查詢包含與$ virtual_mailbox_domains匹配的域中的所有有效地址。
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,mysql:/etc/postfix/mysql-virtual-email2email.cf
用於將特定郵件地址或域別名混合到其他本地或遠程地址

4.創建連接mysql的虛擬用戶文件

4.1創建配置文件

創建虛擬域名配置

vim /etc/postfix/mysql-virtual-mailbox-domains.cf 
user = mail_admin
password = mys123456
hosts = 127.0.0.1
dbname = mail
query = SELECT 1 FROM domains WHERE name=‘%s‘

創建虛擬郵箱配置

vim /etc/postfix/mysql-virtual-mailbox-maps.cf 
user = mail_admin
password = mys123456
hosts = 127.0.0.1
dbname = mail
query = SELECT 1 FROM users WHERE email=‘%s‘

創建電子郵件與文件映射

vim /etc/postfix/mysql-virtual-alias-maps.cf 
user = mail_admin
password = mys123456
hosts = 127.0.0.1
dbname = mail
query = SELECT destination FROM aliases WHERE source=‘%s‘

vim /etc/postfix/mysql-virtual-email2email.cf 
user = mail_admin
password = mys123456
hosts = 127.0.0.1
dbname = mail
query = SELECT email FROM users WHERE email=‘%s‘

啟動postfix

service postfix restart

4.2 測試文件是否調用成功

postmap -q sijibao.info mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
1
postmap -q [email protected] mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
1
postmap -q [email protected] mysql:/etc/postfix/mysql-virtual-alias-maps.cf
[email protected]

返回結果就配置正常

5.更改master.cf配置文件

cp /etc/postfix/master.cf /etc/postfix/master.cf.org

vim /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
  -o syslog_name=postfix/submission
  -o smtpd_tls_security_level=encrypt
  -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=$mua_sender_restrictions
  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
  -o milter_macro_daemon_name=ORIGINATING
smtps     inet  n       -       n       -       -       smtpd
  -o syslog_name=postfix/smtps
  -o smtpd_tls_wrappermode=yes
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_reject_unlisted_recipient=no
  -o smtpd_client_restrictions=$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}
dovecot   unix  -       n       n       -       -       pipe
    flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver -f ${sender} -d ${recipient}

-------------------------------------------------

重啟postfix

service postfix restart

6.測試本地郵件服務是否正常

6.1 smtp協議命令源語

helo （smtp協議）
ehlo（esmtp協議）

mail from：senduser  指定發件人信息
rcpt to:reciver             指定收件人信息      對於公共郵箱必須有域名、A紀錄、PTR解析。
data                    指定發送的信息

6.2 測試

telnet 127.0.0.1 25
helo mail.sijibao.info
mail from:[email protected]
250 2.1.0 Ok
rcpt to:[email protected]
250 2.1.5 Ok
data
354 End data with <CR><LF>.<CR><LF>
This is a test mail from root.
.
250 2.0.0 Ok: queued as 3E55D20DCF12
quit  
221 2.0.0 Bye

[root@mail conf.d]#  mailq
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
3E55D20DCF12      355 Fri Jun 15 14:57:01  [email protected]
                                                  (mail transport unavailable)

7. Dovecot Configuration Setup

備份文件

cp /etc/dovecot/dovecot.conf /etc/dovecot/dovecot.conf.org
cp /etc/dovecot/conf.d/10-mail.conf /etc/dovecot/conf.d/10-mail.conf.org
cp /etc/dovecot/conf.d/10-auth.conf /etc/dovecot/conf.d/10-auth.conf.org
cp /etc/dovecot/dovecot-sql.conf.ext /etc/dovecot/dovecot-sql.conf.ext.org
cp /etc/dovecot/conf.d/10-master.conf /etc/dovecot/conf.d/10-master.conf.org
cp /etc/dovecot/conf.d/10-ssl.conf /etc/dovecot/conf.d/10-ssl.conf.org

7.1 配置10-mail.conf

vim /etc/dovecot/conf.d/10-mail.conf
mail_location =  maildir:/home/vmail/%d/%n/Maildir   ##指定用戶郵件保存路徑
mail_privileged_group = mail

# groupadd -g 5000 vmail
# useradd -g vmail -u 5000 vmail

vim /etc/dovecot/conf.d/10-auth.conf
auth_mechanisms = plain login
#!include auth-system.conf.ext
!include auth-sql.conf.ext     ##在同一文件中註釋系統用戶登錄行，並通過取消註釋‘auth-sql.conf.ext‘行來啟用MySQL身份驗證

7.2 配置auth-sql.conf.ext

vim /etc/dovecot/conf.d/auth-sql.conf.ext
# Authentication for SQL users. Included from 10-auth.conf.
#
# <doc/wiki/AuthDatabase.SQL.txt>

passdb {
  driver = sql

  # Path for SQL configuration file, see example-config/dovecot-sql.conf.ext
  args = /etc/dovecot/dovecot-sql.conf.ext       ##使用指定文件,mysqlsql驗證密碼
}

# "prefetch" user database means that the passdb already provided the
# needed information and there‘s no need to do a separate userdb lookup.
# <doc/wiki/UserDatabase.Prefetch.txt>
#userdb {
#  driver = prefetch
#}

userdb {
  driver = sql
  args = /etc/dovecot/dovecot-sql.conf.ext       ##使用指定文件,mysqlsql驗證用戶
}

# If you don‘t have any user-specific settings, you can avoid the user_query
# by using userdb static instead of userdb sql, for example:
# <doc/wiki/UserDatabase.Static.txt>
#userdb {
  #driver = static
  #args = uid=vmail gid=vmail home=/var/vmail/%u
#}

7.3 編輯連接sql的文件

vim /etc/dovecot/dovecot-sql.conf.ext
driver = mysql
connect = host=127.0.0.1  dbname=mail user=mail_admin password=mys123456
default_pass_scheme = CRYPT
password_query = SELECT email as user, password FROM users WHERE email=‘%u‘;
user_query = SELECT (‘5000‘) as ‘uid‘,(‘5000‘) as ‘gid‘

# chown -R vmail:dovecot /etc/dovecot
# chmod -R o-rwx /etc/dovecot

7.4 配置10-master.conf

更改dovecot的master文件

vim /etc/dovecot/conf.d/10-master.conf
#default_process_limit = 100
#default_client_limit = 1000

# Default VSZ (virtual memory size) limit for service processes. This is mainly
# intended to catch and kill processes that leak memory before they eat up
# everything.
#default_vsz_limit = 256M

# Login user is internally used by login processes. This is the most untrusted
# user in Dovecot system. It shouldn‘t have access to anything at all.
#default_login_user = dovenull

# Internal user is used by unprivileged processes. It should be separate from
# login user, so that login processes can‘t disturb other processes.
#default_internal_user = dovecot

service imap-login {
  inet_listener imap {
    #port = 143                  ##禁止使用非ssl端口
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }

  # Number of connections to handle before starting a new process. Typically
  # the only useful values are 0 (unlimited) or 1. 1 is more secure, but 0
  # is faster. <doc/wiki/LoginProcess.txt>
  #service_count = 1

  # Number of processes to always keep waiting for more connections.
  #process_min_avail = 0

  # If you set service_count=0, you probably need to grow this.
  #vsz_limit = $default_vsz_limit
}

service pop3-login {
  inet_listener pop3 {
    port = 0            ##禁止使用非ssl端口
  }
  inet_listener pop3s {
    port = 995
    ssl = yes           ##開啟ssl
  }
}

service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    mode = 0600
    user = postfix
    group = postfix
  }

  # Create inet listener only if you can‘t use the above UNIX socket
  #inet_listener lmtp {
    # Avoid making LMTP visible for the entire internet
    #address =
    #port = 
  #}
}

service imap {
  # Most of the memory goes to mmap()ing files. You may need to increase this
  # limit if you have huge mailboxes.
  #vsz_limit = $default_vsz_limit

  # Max. number of IMAP processes (connections)
  #process_limit = 1024
}

service pop3 {
  # Max. number of POP3 processes (connections)
  #process_limit = 1024
}

service auth {
  # auth_socket_path points to this userdb socket by default. It‘s typically
  # used by dovecot-lda, doveadm, possibly imap process, etc. Users that have
  # full permissions to this socket are able to get a list of all usernames and
  # get the results of everyone‘s userdb lookups.
  #
  # The default 0666 mode allows anyone to connect to the socket, but the
  # userdb lookups will succeed only if the userdb returns an "uid" field that
  # matches the caller process‘s UID. Also if caller‘s uid or gid matches the
  # socket‘s uid or gid the lookup succeeds. Anything else causes a failure.
  #
  # To give the caller full permissions to lookup all users, set the mode to
  # something else than 0666 and Dovecot lets the kernel enforce the
  # permissions (e.g. 0777 allows everyone full permissions).
  unix_listener auth-userdb {
    mode = 0666
    user = vmail
    #group = 
  }

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

  # Auth process is run as this user.
  #user = $default_internal_user
  user= dovecot
}

service auth-worker {
  # Auth worker process is run as root by default, so that it can access
  # /etc/shadow. If this isn‘t necessary, the user should be changed to
  # $default_internal_user.
  #user = root
  user = vmail
}

service dict {
  # If dict proxy is used, mail processes should have access to its socket.
  # For example: mode=0660, group=vmail and global mail_access_groups=vmail
  unix_listener dict {
    #mode = 0600
    #user = 
    #group = 
  }
}

重啟dovecot
service dovecot restart

8、測試驗證

使用本地客戶端例如fixmail等
技術分享圖片

郵件服務器postfix+dovecot+mysql

root con 域名 extern ech edi 概覽 value detail 1.前期準備 1.1設置hostname CentOS7,可以通過hostnamectl set-hostname hostname命令設置hostname,並且修改hosts文件.這裏域

郵件服務器postfix+dovecot+mysql

1.1設置hostname

1.2修改防火墻開放端口

1.3域名解析配置

2.安裝Postfix, Dovecot以及數據庫

2.1首先更新系統

2.2 yum 安裝

2.3數據庫概覽

3.配置Postfix

3.1 postfix模塊化配置：

3.2 postfix配置文件解釋：

4.創建連接mysql的虛擬用戶文件

4.1創建配置文件

4.2 測試文件是否調用成功

5.更改master.cf配置文件

6.測試本地郵件服務是否正常

6.1 smtp協議命令源語

6.2 測試

7. Dovecot Configuration Setup

7.1 配置10-mail.conf

7.2 配置auth-sql.conf.ext

7.3 編輯連接sql的文件

7.4 配置10-master.conf

8、測試驗證

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