RHEL4Sendmail邮件服务器的架设转载：linux.chinaitlab/server/_2.html 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）
前提：首先我们 把DNS服务器安装OK能够解析，不明白的看linux.chinaitlab/server/.html
1.首先安装Sendmail所需软件
# 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
# rpm -ivh sendmail-*
warning: sendmail-cf-8.13.1-2.i386.rpm: V3 DSA signature: NOKEY,key ID db42a60e
Preparing…… ###########################################
1:sendmail-doc ########################################### [33%]
2:sendmail-cf ########################################### [67%]
3:sendmail-devel###########################################
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userunknown的错误：
# cat /etc/mail/local-host-names
# local-host-names - include all aliases for your machinehere.
ltest
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48www.03723.com、49）然后m4/etc/ mail/sendmail.mc>/etc/mail/sendmail.cf。
# chkconfig ——list saslauthd 开启认证
saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
# chkconfig ——level 35 saslauthd on # groupadd mailuser
# adduser -g mailuser -s /sbin/nologin mike
# adduser -g mailuser -s /sbin/nologin john
# passwd mike
# passwd john 密码都是123 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CVS 服务器配置高级议题。"3wanmei/" title="科颜氏"target="_blank ">科颜氏邮件发给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：
# cat /etc/mail/access
# Check the /usr/share/doc/sendmail/README.cf file for adescription
# of the format of this file. (search for access_db in thatfile)
# The /usr/share/doc/sendmail/README.cf is part of thesendmail-doc
# package. # by default we allow relaying from localhost……
localhost.localdomain RELAY
localhost RELAY
127.0.0.1 RELAY
ltest RELAY
完成后makemap hash /etc/mail/access.db 6.#service sendmail restart
# service sendmail restart 启动服务
Shutting down sendmail:
Starting sendmail: [ OK ]
Starting sm-client: [ OK ]
# 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;Sat52vernalhere, 17 Mar 2007 12:54:47 +0800
ehlo localhost
250-localhost.localdomain Hello localhost.localdomain , pleasedto 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
# 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…… ###########################################
1:perl-DBI ########################################### [20%]
2:postgresql-libs ########################################### [40%]
3:mysql ########################################### [ 60%]
4:dovecot ########################################### [80%]
5:perl-DBD-MySQL###########################################
把1-5这些软件都安装完毕才可以继续下去呢enjoyuggboots，，，，
# vi /etc/dovecot.conf在protocols = imap imaps 后添加pop3 pop3s
启动dovecot服务
# service dovecot restart
Stopping Dovecot Imap:
Starting Dovecot Imap: [ OK ]
# chkconfig ——level 35 dovecot on
OK了 我们使用客户机测试。
