搭建postfix邮箱服务器

1：修改hostname（先关闭防火墙）

   修改教程
   http://blog.csdn.net/weeknd/article/details/74202118

   格式是
   mail.xxx.com

2：解析DNS
[root@mail ~]# hostname

mail.fa.com
[root@mail ~]#  more /proc/sys/kernel/hostname

mail.fa.com
[root@mail ~]# host fa.com

fa.com has address 178.77.89.28
fa.com mail is handled by 10 ds178-77-89-8.dedicated.hosteurope.de.

3：卸载sendmail
[root@mail ~]# service sendmail stop

[root@mail ~]# yum remove sendmail

4：安装postfix

[root@mail Packages]# rpm -ivh postfix-2.6.6-6.el6_5.x86_64.rpm

warning: postfix-2.6.6-6.el6_5.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY

Preparing...                ########################################### [100%]
        package postfix-2:2.6.6-6.el6_5.x86_64 is already installed

[root@mail Packages]# rpm -qa|grep postfix

postfix-2.6.6-6.el6_5.x86_64

5：备份main.cf

[root@mail Packages]# cd /etc/postfix/

[root@mail postfix]# ls

access  canonical  generic  header_checks  main.cf  master.cf  relocated  transport  virtual

[root@mail postfix]# cp main.cf main.cf.bak

6：修改main.cf
[root@mail postfix]# vi mail.cf

    修改的信息（核对修改）

[root@mail mail]# /usr/sbin/postconf -n

alias_database = hash:/etc/aliases

alias_maps = hash:/etc/aliases

command_directory = /usr/sbin

config_directory = /etc/postfix

daemon_directory = /usr/libexec/postfix

data_directory = /var/lib/postfix

debug_peer_level = 2

home_mailbox = Maildir/         -----419行设置邮件路径（home_mailbox=Mailbox也需要开启）

html_directory = no

inet_interfaces = all           -----116行postfix监听端口

inet_protocols = ipv4           -----119行postfix支持的协议类型

mail_owner = postfix

mail_spool_directory = /data/mail   -----425行邮件存储路径

mailq_path = /usr/bin/mailq.postfix

manpage_directory = /usr/share/man

mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain    ----164行接收邮件的主机名和域名

mydomain = fa.com                 -----83行填写域名  

myhostname = mail.fa.com          -----75行填写配置的hostname

mynetworks = 127.0.0.0/8          -----264行设置网络可以转发的地址（此项填写的值表示无需smtp认证）

myorigin = $mydomain              -----99行引用域名

newaliases_path = /usr/bin/newaliases.postfix

queue_directory = /var/spool/postfix

readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES

sample_directory = /usr/share/doc/postfix-2.6.6/samples

sendmail_path = /usr/sbin/sendmail.postfix

setgid_group = postdrop

unknown_local_recipient_reject_code = 550
7：重启postfix

[root@mail mail]# service iptables stop

[root@mail mail]# service iptables start
设置开机自动启动

[root@mail mail]# chkconfig postfix on 
8：测试发送邮件是否成功

[root@mail postfix]# echo 'txt body'|mail -s 'txt tile' xxx@163.com
查看日志

[root@mail mail]# tail -f /var/log/maillog 

Sep 18 16:12:02 mail postfix/pickup[3305]: 2E117180878: uid=0 from=<root>

Sep 18 16:12:02 mail postfix/cleanup[3311]: 2E117180878: message-id=<20170918081202.2E117180878@mail.fa.com>

Sep 18 16:12:02 mail postfix/qmgr[3306]: 2E117180878: from=<root@fa.com>, size=420, nrcpt=1 (queue active)

Sep 18 16:12:27 mail postfix/smtp[3313]: 2E117180878: to=<xxx@163.com>, relay=163mx03.mxmail.netease.com[220.181.14.160]:25, delay=25, delays=0.07/0.01/25/0.17, dsn=2.0.0, status=sent (250 Mail OK queued as mx45,X8CowEBJw0ztf79ZGX91JA--.8118S2 1505722349)
Note:250 mail ok表示邮件已经发送成功

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