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Linux系统中安装和配置sendmail邮件服务器

2014-07-13 20:29:57 来源:中存储网
这次我们来学习Linux系统中的Sendmail服务器的配置。(邮件服务器的IP192.168.1.2 主机域名为mail.ltest.com)
  前提:首先我们 把DNS服务器安装OK 能够解析。

  1.首先安装Sendmail所需软件
  [root@localhost ~]# rpm -q sendmail m4
  sendmail-8.13.1-2
  m4-1.4.1-16 已经默认安装了,还需挂载第4张光盘,安装与sendmail相关的软件
  [root@localhost RPMS]# rpm -ivh sendmail-*
  warning: sendmail-cf-8.13.1-2.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
  Preparing…… ########################################### [100%]
  1:sendmail-doc ########################################### [ 33%]
  2:sendmail-cf ########################################### [ 67%]
  3:sendmail-devel ########################################### [100%]

  2.修改/etc/mail/local-hosts-name文件。
  增加本地域和主机的FQDN,记住只是本地主机的FQDN和域名FQDN,不要添加其他域的,否则向外域发送邮件的时候会出现user unknown的错误:
  [root@localhost named]# cat /etc/mail/local-host-names
  # local-host-names - include all aliases for your machine here.
  ltest.com

  3.更改/etc/mail/sendmail.mc文件,修改下列地方:
  DaemonPortsOptions=Port=smtp,Addr=127.0.0.1, Name=MTA 更改为:
  DaemonPortsOptions=Port=smtp,Addr=yourip或者0.0.0.0, Name=MTA
  然后m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

  4.用户管理
  认证的配置:修改/etc/mail/sendmail.mc中的字段,取消“TRUST_AUTH_MECH”一行和下一行“define” 处的注释。(于sendmail.mc文件的第48、49)然后m4 /etc/ mail/sendmail.mc>/etc/mail/sendmail.cf。
  [root@localhost named]# chkconfig ——list saslauthd 开启认证
  saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
  [root@localhost named]# chkconfig ——level 35 saslauthd on
  建立用户帐号
  [root@localhost named]# groupadd mailuser
  [root@localhost named]# adduser -g mailuser -s /sbin/nologin mike
  [root@localhost named]# adduser -g mailuser -s /sbin/nologin john
  [root@localhost named]# passwd mike
  [root@localhost named]# passwd john 密码都是123
  设置邮件别名和邮件群发
  修改/etc/aliases文件实现邮件转发和邮件列表:
  admin: mike 为邮件用户mike设置别名admin
  testgroup: mike,john 实现群发 发给testgroup的邮件发给mike 和 john 以上2个可以分别测试
  #newaliases

  5.访问控制设置
  更改/etc/mail/accesss文件,增加:
  [root@localhost named]# cat /etc/mail/access
  # Check the /usr/share/doc/sendmail/README.cf file for a description
  # of the format of this file. (search for access_db in that file)
  # The /usr/share/doc/sendmail/README.cf is part of the sendmail-doc
  # package.
  #
  # by default we allow relaying from localhost……
  localhost.localdomain RELAY
  localhost RELAY
  127.0.0.1 RELAY
  ltest.com RELAY
  完成后makemap hash /etc/mail/access.db < /etc/mail/access进行数据库更新。

  6.#service sendmail restart
  [root@localhost named]# service sendmail restart 启动服务
  Shutting down sendmail: [FAILED]
  Starting sendmail: [ OK ]
  Starting sm-client: [ OK ]
  [root@localhost named]# telnet localhost 25
  Trying 127.0.0.1……
  Connected to localhost.localdomain (127.0.0.1).
  Escape character is '^]'.
  220 localhost.localdomain ESMTP Sendmail 8.13.1/8.13.1; Sat, 17 Mar 2007 12:54:47 +0800
  ehlo localhost
  250-localhost.localdomain Hello localhost.localdomain [127.0.0.1], pleased to meet you
  250-ENHANCEDSTATUSCODES
  250-PIPELINING
  250-8BITMIME
  250-SIZE
  250-DSN
  250-ETRN
  250-AUTH DIGEST-MD5 CRAM-MD5 LOGIN PLAIN ——认证应该生效
  250-DELIVERBY
  250 HELP
  quit
  221 2.0.0 localhost.localdomain closing connection
  Connection closed by foreign host.

  7.安装邮局服务
  [root@localhost RPMS]# rpm -ivh dovecot-0.99.11-2.EL4.1.i386.rpm ——aid
  warning: dovecot-0.99.11-2.EL4.1.i386.rpm: V3 DSA signature: NOKEY, key ID db42a60e
  Preparing…… ########################################### [100%]
  1:perl-DBI ########################################### [ 20%]
  2:postgresql-libs ########################################### [ 40%]
  3:mysql ########################################### [ 60%]
  4:dovecot ########################################### [ 80%]
  5:perl-DBD-MySQL ########################################### [100%]
  把1-5这些软件都安装完毕才可以继续下去呢,,,,
  [root@localhost /]# vi /etc/dovecot.conf在protocols = imap imaps 后添加pop3 pop3s
  启动dovecot服务
  [root@localhost /]# service dovecot restart
  Stopping Dovecot Imap: [FAILED]
  Starting Dovecot Imap: [ OK ]
  [root@localhost /]# chkconfig ——level 35 dovecot on
  OK了 我们使用客户机测试。