Sendmail 邮件服务器安装和优化

配置SENDMAIL服务器:

[root@homeserver ~]# vim /etc/sysconfig/network //修改主机名(@后面的内容)

NETWORKING=yes

NETWORKING_IPV6=no

HOSTNAME=homeserver.home.net

NISDOMAIN=home

[root@homeserver ~]# vim /etc/hosts //添加主机IP解析记录

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1 localhost.localdomain localhost

::1 localhost6.localdomain6 localhost6

192.168.1.222 homeserver.home.net

安装相关RPM包:

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/sendmail-cf-8.13.8-2.el5.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/sendmail-8.13.8-2.el5.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/cyrus-sasl-lib-2.1.22-4.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/cyrus-sasl-plain-2.1.22-4.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/cyrus-sasl-2.1.22-4.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/perl-DBI-1.52-1.fc6.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/mysql-5.0.45-7.el5.i386.rpm

[root@homeserver ~]# rpm -ivh /var/rhcepkg/Server/dovecot-1.0.7-2.el5.i386.rpm

[root@homeserver ~]# vim /etc/mail/sendmail.mc //修改SENDMAIL主配置文件

DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

[root@homeserver ~]# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf //M4宏编译

[root@homeserver ~]# /usr/sbin/saslauthd -a shadow

[root@homeserver ~]# echo /usr/sbin/saslauthd -a shadow >> /etc/rc.local

[root@homeserver ~]# vim /etc/rc.local

[root@homeserver ~]# /etc/init.d/saslauthd restart

Stopping saslauthd: [ OK ]

Starting saslauthd: [ OK ]

[root@homeserver ~]# /etc/init.d/sendmail restart

Shutting down sm-client: [ OK ]

Shutting down sendmail: [ OK ]

Starting sendmail: [ OK ]

Starting sm-client: [ OK ]

[root@homeserver ~]# vim /etc/dovecot.conf //修改dovecot配置文件

protocols = pop3

[root@homeserver ~]# /etc/init.d/dovecot restart

Stopping Dovecot Imap: [FAILED]

Starting Dovecot Imap: [ OK ]

[root@homeserver ~]# chkconfig sendmail on //设定开机自启

[root@homeserver ~]# chkconfig dovecot on

[root@homeserver ~]# chkconfig saslauthd on

[root@homeserver ~]# netstat –tl //检查服务是否开启

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address Foreign Address State

tcp 0 0 *:768 *:* LISTEN

tcp 0 0 localhost.localdomain:2208 *:* LISTEN

tcp 0 0 *:nfs *:* LISTEN

tcp 0 0 *:708 *:* LISTEN

tcp 0 0 *:39720 *:* LISTEN

tcp 0 0 *:netbios-ssn *:* LISTEN

tcp 0 0 *:5900 *:* LISTEN

tcp 0 0 *:sunrpc *:* LISTEN

tcp 0 0 *:dec_dlm *:* LISTEN

tcp 0 0 *:ftp *:* LISTEN

tcp 0 0 *:918 *:* LISTEN

tcp 0 0 localhost.localdomain:ipp *:* LISTEN

tcp 0 0 *:smtp *:* LISTEN

tcp 0 0 *:microsoft-ds *:* LISTEN

tcp 0 0 localhost.localdomain:2207 *:* LISTEN

tcp 0 0 *:pop3 *:* LISTEN

tcp 0 0 *:http *:* LISTEN

tcp 0 0 *:ssh *:* LISTEN

[root@homeserver ~]# iptables -L –n //检查防火墙是否有阻止策略

Chain INPUT (policy ACCEPT)

target prot opt source destination

Chain FORWARD (policy ACCEPT)

target prot opt source destination

Chain OUTPUT (policy ACCEPT)

target prot opt source destination

[root@homeserver ~]# sendmail –d0 //查看sendmail所能识别的主机名

============ SYSTEM IDENTITY (after readcf) ============

(short domain name) $w = homeserver

(canonical domain name) $j = homeserver.home.net

(subdomain name) $m = home.net

(node name) $k = homeserver.home.net

=======================================================

Recipient names must be specified

[root@homeserver ~]# vim /etc/mail/local-host-names //添加邮件主机名(@后面的内容)

# local-host-names - include all aliases for your machine here.

homeserver.home.net

[root@homeserver ~]# telnet 192.168.1.222 25 //进行本地测试

Trying 192.168.1.222...

Connected to homeserver.home.net (192.168.1.222).

Escape character is '^]'.

220 homeserver.home.net ESMTP Sendmail 8.13.8/8.13.8; Mon, 5 Apr 2010 13:55:35 +0800

HELO homeserver.home.net //开始”握手”

250 homeserver.home.net Hello homeserver.home.net [192.168.1.222], pleased to meet you

MAIL From : irini@homeserver.home.net //发件人地址

250 2.1.0 irini@homeserver.home.net... Sender ok

RCPT To : jessica@homeserver.home.net //收件人地址

250 2.1.5 jessica@homeserver.home.net... Recipient ok

DATA //开始输入内容

354 Enter mail, end with "." on a line by itself

this is a test mail //邮件内容

. //”点号”表示结束

250 2.0.0 o355tZQ3008174 Message accepted for delivery

Quit //退出

221 2.0.0 homeserver.home.net closing connection

Connection closed by foreign host.

[root@homeserver ~]# mailq //查看当前邮件列队

/var/spool/mqueue is empty

Total requests: 0

[root@homeserver ~]# su – Jessica //切换到JESSICA家目录下

-bash-3.2$ mail //查看邮件内容

Mail version 8.1 6/6/93. Type ? for help.

"/var/spool/mail/jessica": 1 message 1 new

>N 1 irini@homeserver.hom Mon Apr 5 13:57 11/457

& 1

Message 1:

From irini@homeserver.home.net Mon Apr 5 13:57:51 2010

Date: Mon, 5 Apr 2010 13:55:35 +0800

From: irini@homeserver.home.net

this is a test mail //与之前的内容相符

& q

[root@homeserver ~]# mutt -f pop://frank@homeserver.home.net //POP远程邮件接收测试, frank@homeserver.home.net 为邮件发送地址

Password for frank@homeserver.home.net: XXXXXX

q:Quit d:Del u:Undel s:Save m:Mail r:Reply g:Group ?:Help

---Mutt: pop://frank@homeserver.home.net/ [Msgs:0]---(date/date)------------------------------(all)---

To: feng9422@126.com //邮件接收地址

Subject: check for this test

y:Send q:Abort t:To c:CC s:Subj a:Attach file d:Descrip ?:Help

From: root <root@homeserver.home.net>

To: feng9422@126.com

Have u received this test? //写邮件内容

q:Quit d:Del u:Undel s:Save m:Mail r:Reply g:Group ?:Help

---Mutt: pop://frank@homeserver.home.net/ [Msgs:0]---(date/date)----------------------------------------------------------------(all)---

Mail sent.

邮件服务器优化:

1- 关闭邮件RELAY功能

[root@homeserver ~]# vim /etc/mail/access //只留本地RELAY

Connect:localhost.localdomain RELAY

Connect:localhost RELAY

Connect:127.0.0.1 RELAY

[root@homeserver ~]# makemap hash access.db > /etc/mail/access //修改后执行此命令

2- 设定帐号不可登录系统

#useradd test –s /sbin/nologin

3- 添加事实黑名单-RBL(realtime blackhole list),服务器在接受邮件时会先去RBL的服务器查询该邮件地址是否处于黑名单中.

[root@homeserver ~]# vim /etc/mail/sendmail.mc

FEATURE（`dnsbl'，`relays.ordb.org'，` ″Email blocked using ORDB.org - see <http：//ORDB.org/lookup/﹖host=″$&{client_addr}″>″'）

[root@homeserver ~]# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf //M4宏编译

[root@homeserver ~]# /etc/init.d/sendmail restart

4- spamassassin 来防止垃圾邮件

[root@homeserver ~]# yum install spamassassinlain //yum安装,因为依赖的包太多了

[root@homeserver ~]# /etc/init.d/spamassassin restart

Stopping spamd: [FAILED]

Starting spamd: [ OK ]

[root@homeserver ~]# chkconfig spamassassin on

默认规则(已经很充足了)都在/usr/share/spamassassin/目录下以.cf结尾的文件

[root@homeserver ~]# vim /usr/share/spamassassin/local.cf //添加本地规则

whitelist_from_rcvd irinilu@theetonhotel.com //允许这个地址的EM

whitelist_from_rcvd @theetonhotel.com //允许这个域名的EM

#wget –N –P /usr/share.spamassassin/ www.ccert.edu.cn/spam/sa/Chinese_rules.cf //下载中文反垃圾规则,也可做成计划任务,定期下载更新

--18:02:25-- http://www.ccert.edu.cn/spam/sa/Chinese_rules.cf

Resolving www.ccert.edu.cn... 202.112.57.9

Connecting to www.ccert.edu.cn|202.112.57.9|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 55342 (54K) [text/plain]

Remote file is newer, retrieving.

--18:02:26-- http://www.ccert.edu.cn/spam/sa/Chinese_rules.cf

Connecting to www.ccert.edu.cn|202.112.57.9|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 55342 (54K) [text/plain]

Saving to: `/usr/share/spamassassin/Chinese_rules.cf'

100%[=======================================================>]55,342 61.1K/s in 0.9s

18:02:27 (61.1 KB/s) - `/usr/share/spamassassin/Chinese_rules.cf' saved [55342/55342]

转载于:https://blog.51cto.com/irinilu/292526

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