如何在Linux下安装Sendmail服务器
Sendmail现在是最流行的邮件服务器,那我们来看看如何在Linux下安装Sendmail服务器。
1、从www.sendmail.org下载最新的版本(这个snedmail倒是有必要升级为最新的版本,因为它的升级主要是安全漏洞问题)。这里说明的是用的sendmail-8.12.2.tar.gz
2、cd /usr/local/src/
3、把文件下载到:/usr/local/src中
4、tar zxvf sendmail-8.12.2.tar.gz
5、cd /usr/local/src/sendmail-8.12.2
6、chmod go-w / /etc /etc/mail /usr /var /var/spool /var/spool/mqueue
7、chown root / /etc /etc/mail /usr /var /var/spool /var/spool/mqueue
8、cd /usr/local/src/sendmail-8.12.2/sendmail
9、sh Build
10、cd /usr/local/src/sendmail-8.12.2/cf/cf
11、建立文件sendmail.mc内容如下,你可根据需要修改相应部分。
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 running this macro config through the m4
dnl preprocessor:
dnl m4 /etc/sendmail.mc > /etc/sendmail.cf
dnl You will need to have the Sendmail-cf pacage installed for this to work.
include(`/usr/local/src/sendmail-8.12.2/cf')
define(`confDEF_USER_ID',`8:12')
OSTYPE(`linux')
undefine(`UUCP_RELAY')
undefine(`BITNET_RELAY')
define(`confTO_CONNECT', `1m')
define(`confTRY_NULL_MX_LIST',true)
define(`confDONT_PROBE_INTERFACES',true)
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')
define(`SMART_HOST',compaq.rd.xxx.com)
<---这条用于(非HUB)缺省使用HUB发送邮件
MASQUERADE_AS(`rd.xxx.com')
<-------------------------
FEATURE(`masquerade_entire_domain')
<---这三条用于邮件地址伪装
FEATURE(`masquerade_envelope')
<-------------------------
FEATURE(`smrsh',`/usr/sbin/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)
FEATURE(`access_db')
FEATURE(`blacklist_recipients')
FEATURE(`accept_unresolvable_domains')
MAILER(smtp)
MAILER(procmail)
dnl We strongly recommend to comment this one out if you want to protect
dnl yourself from spam. However, the laptop and users on computers that do
dnl not hav 24x7 DNS do need this.
dnl FEATURE(`relay_based_on_MX')
12、sh Build install-cf
13、groupadd smmsp
14、useradd smmsp
15、cd cd /usr/local/src/sendmail-8.12.2/sendmail
16、sh Build install
17、cd /usr/local/src/sendmail-8.12.2/makemap
18、sh Build clean
19、sh Build all
20、sh Build install
21、cd /usr/local/src/sendmail-8.12.2/
22、在本域DNS主数据库文件中增加MX纪录:
rd.xxx.com. IN MX 0 compaq
注意修改相应部分。那个0是有几个邮件集中器的时候用于标记先后顺序的。当有好几个MX的时候,建议顺序写为10、20、30…
23、在/etc/mail目录下创建access文件,内容类似如下:
127.0.0.1 RELAY
21.9.22 RELAY
211.99.221.238 RELAY
然后:makemap hash access.db < access
24、创建文件/etc/mail/local-host-names,其内容为本机的拥有的域名信息。
rd.xxx.com
compaq.rd.xxx.com
25、创建文件/etc/mail/aliases,内容类似:
MAILER-DAEMON: postmaster
postmaster: root
bin: root
daemon: root
nobody: root
运行newaliases创建数据库。
创建别名文件的意义之一在于当邮件发往域中其他邮件服务器的用户而不是mail HUB用户的时候用。
比如增加一条:
atan: atan@fbsd
则导致邮件发往mail HUB的时候自动转发到[email protected]
26、启动sendmail: /usr/sbin/sendmail -bd -q30m