Install postfix on Ubuntu 14.04.txt

Ubuntu 14.04上安装和配置Postfix邮件服务详细教程

    Postfix: 用来接受和发送邮件的邮件服务器，正确说法应该叫邮件传送代理（Mail Transfer Agent，MTA），是邮件服务最重要的部分；
    Dovecot: POP 和 IMAP 服务器，用来管理本地邮件目录以便用户能通过 Mail.app, Thunderbird, Mutt 等邮件客户端（又叫邮件用户代理 Mail User Agent, MUA）登陆和下载邮件；
    Postgrey: 邮件灰名单工具，可简单的抵挡垃圾邮件；
    amavisd-new: 一个代理，用于连接邮件传输代理和内容检查器，可以理解为 Postfix 把邮件交给它，它负责联系病毒扫描和垃圾邮件过滤；
    Clam AntiVirus: 病毒扫描工具；
    SpamAssassin: 垃圾邮件内容过滤工具；
    Postfix Admin: Postfix 的 Web 前端，用来管理邮件用户和域名。

设置主机名（不要跳过这一步）：

# hostname mail.seniorit.cn

# vi /etc/hosts
127.0.0.1 mail.seniorit.cn localhost

更新系统：

$ sudo apt-get update
$ sudo apt-get upgrade

安装必要软件包

apt-get install apache2 mysql-server php5 php-apc php-xml-parser php5-cli php5-common php5-dev php5-curl php5-memcache php5-gd php-pear php5-imap php5-mcrypt php5-xmlrpc php5-xsl php5-mysql php5-ldap php5-mcrypt php5-cli php-soap php5-json php5-imap phpmyadmin

安装 LAMP，Postfix 本身不需要 Apache/PHP/MySQL，但是因为要安装 Postfix Admin，并且管理用户需要用到数据库，所以要安装 Apache/PHP 和 MySQL.

$ sudo apt-get install lamp-server^
$ sudo apt-get install php-apc php5-curl php5-gd php-xml-parser php5-imap

安装邮件服务器及一些工具：

$sudo apt-get install mail-server^

$sudo apt-get install postfix-mysql dovecot-mysql postgrey -y
$sudo apt-get install amavis clamav clamav-daemon spamassassin -y

$sudo apt-get install libnet-dns-perl pyzor razor -y
$sudo apt-get install arj bzip2 cabextract cpio file gzip nomarch pax unzip zip -y

配置 Apache

编辑 apache 配置文件后重启：

sudo vi /etc/apache2/apache2.conf
add:
    ServerName  localhost:80

Configure PHP:

change the expose_php setting in /etc/php5/apache2/php.ini. Set it to "Off":
expose_php = Off
add/modify the following settings:
post_max_size = 32M
upload_max_filesize = 32M
memory_limit = 768M

php5enmod imap mcrypt

$ sudo /etc/init.d/apache2 restart

配置 MySQL 数据库

创建一个名为 mail 的数据库并设置权限和密码：

$ mysql -uroot -p

mysql> create database mail;
mysql> grant all on mail.* to ‘mail‘@‘localhost‘ identified by ‘nipc#123‘;

配置 Postfix Admin

下载 psotfixadmin，

wget http://downloads.sourceforge.net/project/postfixadmin/postfixadmin/postfixadmin-2.3.8/postfixadmin-2.3.8.tar.gz

tar -zxf postfixadmin-2.3.8.tar.gz
mv postfixadmin-2.3.8 /var/www/html/postfixadmin
chown -R www-data:www-data /var/www/html/postfixadmin

配置 postfixamdin，标准的 php 程序配置方法，填入访问数据库需要的信息，其中 setup_password 部分稍后再填入：

$ sudo vi /var/www/html/postfixadmin/config.inc.php
...
$CONF[‘configured‘] = true;
$CONF[‘setup_password‘] = ‘稍后替代‘;
$CONF[‘postfix_admin_url‘] = ‘http://mail.seniorit.cn/postfixadmin‘;
$CONF[‘database_type‘] = ‘mysql‘;
$CONF[‘database_host‘] = ‘localhost‘;
$CONF[‘database_user‘] = ‘mail‘;
$CONF[‘database_password‘] = ‘nipc#123‘;
$CONF[‘database_name‘] = ‘mail‘;
$CONF[‘admin_email‘] = ‘admin@seniorit.cn‘;
$CONF[‘encrypt‘] = ‘md5crypt‘;
...

用浏览器访问 http://mail.seniorit.cn/postfixadmin/setup.php，用哈希后的密码字符串替代上面 $CONF[‘setup_password’] = ‘稍后替代’ 中的相关部分。

为了安全考虑，最好禁止 web 访问 setup.php：

$ sudo vi /var/www/postfixadmin/.htaccess

<Files "setup.php">
deny from all
</Files>

配置 Dovecot

给系统添加 vmail 帐号：

$ sudo useradd -r -u 150 -g mail -d /var/vmail -s /sbin/nologin -c "Virtual Mail" vmail
$ sudo mkdir /var/vmail
$ sudo chmod 770 /var/vmail
$ sudo chown vmail:mail /var/vmail

开始配置 Dovecot，dovecot 支持多种认证方式，这里采用数据库认证，
注意下面的配置文件一个包含一个，初看比较乱，
10-auth.conf 有 !include auth-sql.conf.ext 一行，会包含 /etc/dovecot/conf.d/auth-sql.conf.ext，
而 auth-sql.conf.ext 会包含下面要提到的 /etc/dovecot/dovecot-sql.conf.ext，
这样只要用不同的 include 就可以切换不同的认证方式，虽然初看复杂一点但是熟悉以后用起来还是挺方便的。

$ sudo vi /etc/dovecot/conf.d/10-auth.conf

disable_plaintext_auth = yes
auth_mechanisms = plain login

!include auth-sql.conf.ext

配置 Dovecot，设置数据库参数，以便 dovecot 能正确访问刚才创建的 mail 数据库：

$ sudo vi /etc/dovecot/dovecot-sql.conf.ext
...
driver = mysql
connect = host=localhost dbname=mail user=mail password=nipc#123
default_pass_scheme = MD5-CRYPT
...
password_query = \
  SELECT username as user, password, ‘/var/vmail/%d/%n‘ as userdb_home, \
  ‘maildir:/var/vmail/%d/%n‘ as userdb_mail, 150 as userdb_uid, 8 as userdb_gid \
  FROM mailbox WHERE username = ‘%u‘ AND active = ‘1‘

user_query = \
  SELECT ‘/var/vmail/%d/%n‘ as home, ‘maildir:/var/vmail/%d/%n‘ as mail, \
  150 AS uid, 8 AS gid, concat(‘dirsize:storage=‘, quota) AS quota \
  FROM mailbox WHERE username = ‘%u‘ AND active = ‘1‘
...

用户在服务器上用来存放邮件的地方在哪呢？所以需要指定邮件存放地址 /var/vmail，这个目录上面在创建 vmail 帐号时已经创建了：

$ sudo vi /etc/dovecot/conf.d/10-mail.conf
...
mail_location = maildir:/var/vmail/%d/%n
mail_uid = vmail
mail_gid = mail
...

修改 /etc/dovecot/conf.d/10-master.conf

$ sudo vi /etc/dovecot/conf.d/10-master.conf
...
service auth {
  unix_listener auth-userdb {
   mode = 0600
    user = vmail
    group = mail
  }
  unix_listener /var/spool/postfix/private/auth {
    mode = 0660
    user = postfix
    group = postfix       
  }
...

确认 dovecot 有权限读取配置文件：

$ sudo chown -R vmail:dovecot /etc/dovecot
$ sudo chmod -R o-rwx /etc/dovecot

配置 Amavis, ClamAV, SpamAssassin

互加 clamav, amavis 用户到对方组里以便能互相访问，配置过滤模式：

$ sudo adduser clamav amavis
$ sudo adduser amavis clamav

$ sudo vi /etc/amavis/conf.d/15-content_filter_mode
use strict;
@bypass_virus_checks_maps = (
   %bypass_virus_checks, @bypass_virus_checks_acl, $bypass_virus_checks_re);
@bypass_spam_checks_maps = (
   %bypass_spam_checks, @bypass_spam_checks_acl, $bypass_spam_checks_re);
1; # ensure a defined return

启用 spamassassin：

$ sudo vi /etc/default/spamassassin
...
ENABLED=1
CRON=1
...

配置 Postfix

main.cf 是 postfix 的主要配置文件：

$ sudo /etc/postfix/main.cf
...
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes

myhostname = mail.seniorit.cn
myorigin = /etc/hostname
mydestination = mail.seniorit.cn, localhost
mynetworks = 127.0.0.0/8
inet_interfaces = all
mynetworks_style = host

virtual_mailbox_base = /var/vmail/
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf,
 mysql:/etc/postfix/mysql_virtual_alias_domainaliases_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf

mail_spool_directory = /var/mail
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1

content_filter = amavis:[127.0.0.1]:10024

header_checks = regexp:/etc/postfix/header_checks
...

注意上面配置有行 header_checks = regexp:/etc/postfix/header_checks，我们现在还没有 header_checks 文件，创建一个并包含一下内容，给自己邮件增加一点隐私，过滤一些信息：

$ sudo vi /etc/postfix/header_checks
/^Received:/                 IGNORE
/^User-Agent:/               IGNORE
/^X-Mailer:/                 IGNORE
/^X-Originating-IP:/         IGNORE
/^x-cr-[a-z]*:/              IGNORE
/^Thread-Index:/             IGNORE

还需要配置 master.cf 文件：

$ sudo vi /etc/postfix/master.cf
...
smtps     inet  n       -       -       -       -       smtpd
  -o syslog_name=postfix/smtps
  -o smtpd_tls_wrappermode=yes
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_tls_auth_only=yes
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
  -o smtpd_sasl_security_options=noanonymous,noplaintext
  -o smtpd_sasl_tls_security_options=noanonymous

amavis      unix    -       -       -       -       2       smtp
  -o smtp_data_done_timeout=1200
  -o smtp_send_xforward_command=yes
  -o disable_dns_lookups=yes
  -o max_use=20
127.0.0.1:10025 inet    n       -       -       -       -       smtpd
  -o content_filter=
  -o local_recipient_maps=
  -o relay_recipient_maps=
  -o smtpd_restriction_classes=
  -o smtpd_delay_reject=no
  -o smtpd_client_restrictions=permit_mynetworks,reject
  -o smtpd_helo_restrictions=
  -o smtpd_sender_restrictions=
  -o smtpd_recipient_restrictions=permit_mynetworks,reject
  -o smtpd_data_restrictions=reject_unauth_pipelining
  -o smtpd_end_of_data_restrictions=
  -o mynetworks=127.0.0.0/8
  -o smtpd_error_sleep_time=0
  -o smtpd_soft_error_limit=1001
  -o smtpd_hard_error_limit=1000
  -o smtpd_client_connection_count_limit=0
  -o smtpd_client_connection_rate_limit=0
  -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks

dovecot      unix   -        n      n       -       -   pipe
  flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/dovecot-lda -d $(recipient)

还需要配置几个文件：

$ sudo vi /etc/postfix/mysql_virtual_alias_domainaliases_maps.cf
user = mail
password = nipc#123
hosts = 127.0.0.1
dbname = mail
query = SELECT goto FROM alias,alias_domain
  WHERE alias_domain.alias_domain = ‘%d‘
  AND alias.address=concat(‘%u‘, ‘@‘, alias_domain.target_domain)
  AND alias.active = 1

$ sudo vi /etc/postfix/mysql_virtual_alias_maps.cf
user = mail
password = nipc#123
hosts = 127.0.0.1
dbname = mail
table = alias
select_field = goto
where_field = address
additional_conditions = and active = ‘1‘

$ sudo vi /etc/postfix/mysql_virtual_domains_maps.cf
user = mail
password = nipc#123
hosts = 127.0.0.1
dbname = mail
table = domain
select_field = domain
where_field = domain
additional_conditions = and backupmx = ‘0‘ and active = ‘1‘

$ sudo vi /etc/postfix/mysql_virtual_mailbox_domainaliases_maps.cf
user = mail
password = nipc#123
hosts = 127.0.0.1
dbname = mail
query = SELECT maildir FROM mailbox, alias_domain
  WHERE alias_domain.alias_domain = ‘%d‘
  AND mailbox.username=concat(‘%u‘, ‘@‘, alias_domain.target_domain )
  AND mailbox.active = 1

$ sudo vi /etc/postfix/mysql_virtual_mailbox_maps.cf
user = mail
password = nipc#123
hosts = 127.0.0.1
dbname = mail
table = mailbox
select_field = CONCAT(domain, ‘/‘, local_part)
where_field = username
additional_conditions = and active = ‘1‘

大功告成，重启相关服务：

$ sudo service spamassassin restart
$ sudo service clamav-daemon restart
$ sudo service amavis restart
$ sudo service dovecot restart
$ sudo service postfix restart

测试 Postfix

用 telnet 连上邮件服务器的 25 端口（SMTP），然后发送 HELO mail.seniorit.cn 指令就会得到 250 mail.seniorit.cn 确认信息：

$ telnet mail.seniorit.cn 25
Trying 192.168.2.66...
Connected to mail.seniorit.cn.
Escape character is ‘^]‘.
220 mail.seniorit.cn ESMTP Postfix (Ubuntu)
HELO mail.seniorit.cn
250 mail.seniorit.cn

用 telnet 发送一封邮件试一下，下面的 MAIL FROM, RCPT TO, DATA, ., QUIT 都是指令：

$ telnet mail.seniorit.cn 25
Trying 192.168.2.66...
Connected to mail.seniorit.cn.
Escape character is ‘^]‘.
220 mail.seniorit.cn ESMTP Postfix (Ubuntu)
MAIL FROM:<test1@seniorit.cn>
250 2.1.0 Ok
RCPT TO:<test2@seniorit.cn>
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: a test message
This is a test message!
.
250 2.0.0 Ok: queued as 6832FF0036
QUIT
221 2.0.0 Bye
Connection closed by foreign host.

Installing and configuring squirrelmail

sudo apt-get install squirrelmail

Configure squirrelmail

sudo squirrelmail-configure

Everything is pre-configured , we just need to change Organization name .

? Press 1 (Organization Preferences) ? again press 1 (Organization Name) ?
Organization Name ? Press S ? Press Q to quit

Now configure apache to enable squirrelmail .

sudo cp /etc/squirrelmail/apache.conf /etc/apache2/sites-available/squirrelmail.conf

sudo a2ensite squirrelmail

sudo service apache2 restart

Now open http://serverIP/squirrelmail in your browser and login using username

Install postfix on Ubuntu 14.04.txt

原文：http://ganzy.blog.51cto.com/91848/1722549