简单(smtp)邮件服务器

RHEL6.0 简单(smtp)邮件服务器搭建

系统环境:rhel6.0-x86_64
dns server:192.168.0.44
mail server:192.168.0.5
client host: 192.168.0.6
smtp server:192.168.0.7(转发邮件)

在192.168.0.44配置DNS服务器
安装dns软件 yum install bind bind-chroot bind-utils bind-libs -y
vim /etc/named.conf
# listen-on port 53 { 127.0.0.1; };
# allow-query { localhost; };

zone "." IN {

type hint;
file "named.ca";
};

zone "example.com" IN {

type master;
file "example.com.zone";
};

配置域名正向解析文件

cp /var/named/named.localhost /var/named/example.com.zone -p

chown named.namd /var/namd/example.com.zone

vim /var/named/example.com.zone

$TTL 1D

@ IN SOA @ root. (

                                0 ; serial

                                1D ; refresh

                                1H ; retry

                                1W ; expire

                                3H ) ; minimum

                    NS    @

                     A     192.168.0.44

server5       A      192.168.0.5

mail        CNAME     server5

server6       A     192.168.0.6

client     CNAME      server6

server7      A      192.168.0.7

smtp     CNAME      server7

example.com. IN MX 10 mail.example.com.

~

example.com的DNS的MX记录必须指向邮件服务器mail.example.com

****注意域后面的点****

启动DNS server

/etc/init.d/named start

若有没有报任何错，则文件无语法错误，可以用dig进行测试，若dig成功的解析出ip，dns配置成功

开始邮件服务器的搭建

mail server在192.168.0.5主机上配置

postfix ----> 邮件传输代理软件

安装接受邮件的软件dovecot，yum install dovecot postfix -y

postconf -e inet_interfaces = all

postconf -e mydestination = example.com

postconf -e myorigin = example.com

postconf -e relayhost = stmp.example.com

}

重启服务

/etc/init.d/postfix restart

/etc/init.d/dovecot restart

mydestination指定mail server接收的邮件的域，必须是以***@example.com结尾的邮件接收，其余的全部拒绝接收（注意红的字体部分的域）

编辑/etc/postfix/main.cf文件通过postconf -e ##=$$，$$部分指定的内容将会覆盖或是改变文件里面##原有的内容

client host在192.168.0.6主机上配置
yum install postifx -y

编辑文件/etc/postfix/main.cf

postconf -e inet_interfaces = localhost

postconf -e myorigin = example.com

postconf -e “local_transport = error:local delivery disabled ”

postconf -e relayhost = smtp.example.com

重启服务  /etc/init.d/postfix restart

smtp server在192.168.0.7主机上配置

yum install postfix -y

编辑文件/etc/postfix/main.cf

postconf -e inet_interfaces = all

postconf -e myorigin = example.com

postconf -e “local_transport = error:local delivery disabled”

重启服务 /etc/inti.d/postfix restart

开始收发邮件的测试

在client(server6)主机发送邮件，假设mail server有一个hazeline用户

client发送邮件：mail hazeline

[root@client ~]# mail hazeline

Subject: hello

helloworld

helloworld

EOT ----> ctrl+d

root@server6 ~]# tail /var/log/maillog

Mar 23 23:51:38 server6 postfix/pickup[2338]: 7FA85424D2: uid=0 from=

Mar 23 23:51:38 server6 postfix/cleanup[2377]: 7FA85424D2: messageid=<[e-mail]>

Mar 23 23:51:38 server6 postfix/qmgr[2069]: 7FA85424D2: from=, size=450, nrcpt=1 (queue active)

Mar 23 23:51:48 server6 postfix/smtp[2380]: 7FA85424D2: to=, orig_to=, relay=smtp.example.com[192.168.0.7]:25, delay=10, delays=0.12/0.02/10/0.18, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as D230C402C9)

Mar 23 23:51:48 server6 postfix/qmgr[2069]: 7FA85424D2: removed

在mail server(server5)

查收hazeline的邮件

[root@server5 ~]# cat /var/spool/mail/hazeline

From [e-mail] Wed Mar 21 05:42:01 2012

Return-Path:

X-Original-To: [e-mail]

Delivered-To: [e-mail]

Received: from server7.example.com (unknown [192.168.0.7])

              by server5.example.com (Postfix) with ESMTP id 30C2241CD5

               for ; Wed, 21 Mar 2012 05:42:01 +0800 (CST)

Received: from server6.example.com (unknown [192.168.0.6])

               by server7.example.com (Postfix) with ESMTP id 27CE8402C9

               for ; Wed, 21 Mar 2012 05:40:40 +0800 (CST)

Received: by server6.example.com (Postfix, from userid 0)

               id D087E424D2; Fri, 23 Mar 2012 23:42:03 +0800 (CST)

Date: Fri, 23 Mar 2012 23:42:03 +0800

To: ----> 接收邮件的用户

Subject: hello ----> 邮件标题

User-Agent: Heirloom mailx 12.4 7/29/08

MIME-Version: 1.0

Content-Type: text/plain; charset=us-ascii

Content-Transfer-Encoding: 7bit

Message-Id: <[e-mail]>

From: [e-mail] (root)

helloworld

helloworld ----> 邮件内容

....GOOD LUCK!