二、工作环境

本文假设用户希望在园区网环境中架设一个电子邮件服务器，为本单位用户提供邮件服务。该服务器拥有一个合法的IP地址和一个合法的域名，并且D的MX记录也指向该域名(注：这里示例域名和IP地址均为伪造域名和地址)。为了满足域名需求，D的域数据文件应该包含以下内容：

IN MX 10 mail
mail IN A 202.99.11.200 screen.width-600)this.style.width=screen.width-600;"> 　　试验环境为:redhat6.2、sendmail.8.11.4、qpoer4.0.3。

三、软件下载

分别下载sendmail和qpoer：


四、Sendmail的配置和安装

Sendmail是目前使用最为广泛的一种E-mail服务器。当前其最新的稳定版本为8.11.4。下载得到tar.gz格式的压缩包以后，将其存放在/usr/src目录下。

解压软件包：

[root@email src]# tar xvfz sendmail.8.11.4.tar.gz
[root@email src]# cd sendmail-8.11.4

编译安装：

[root@email sendmail-8.11.4]# cd sendmail
[root@email sendmail]# sh Build

生成配置文件：

[root@email sendmail]#cd /usr/src/sendmail-8.11.4/cf/cf/

一般该目录下应该有config.mc的文件，如果没有则创建新文件config.mc，内容为：

divert(-1)
dnl This is the macro config file used to generate the /etc/sendmail.cf
dnl file. If you modify thei file you will have to regenerate the
dnl /etc/sendmail.cf by ruing this macro config through the m4
dnl preproceor:
dnl m4 /etc/sendmail.mc > /etc/sendmail.cf
dnl You will need to have the Sendmail-cf package italled for this to work.
include(`/usr/src/sendmail-8.11.4/cf')
define(`confDEF_USER_ID',`8:12')
OSTYPE(`linux')
undefine(`UUCP_RELAY')
undefine(`BITNET_RELAY')
define(`confAUTO_REBUILD')
define(`confTO_COECT', `1m')
define(`confTRY_NULL_MX_LIST',true)
define(`confDONT_PROBE_INTERFACES',true)
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')
FEATURE(`smrsh',`/usr/in/smrsh')
FEATURE(`mailertable',`hash -o /etc/mail/mailertable')
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable')
FEATURE(redirect)
FEATURE(always_add_domain)
FEATURE(use_cw_file)
FEATURE(local_procmail)
MAILER(smtp)
MAILER(procmail)
FEATURE(`acce_db')
FEATURE(`blacklist_recipients')
dnl We strongly recommend to comment this one out if you want to protect
dnl yourself from am. However, the laptop and users on computers that do
dnl not hav 24x7 D do need this.
FEATURE(`accept_unresolvable_domai')
dnl FEATURE(`relay_based_on_MX')