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SendMail的基本配置

Jun 07, 2016 pm 03:31 PM
http basic configuration starter

首发:http://www.chuiniudi.cn/archives/66 基本 配置 需要修改的 配置 文件: /etc/mail/sendmail.mc /etc/mail/local-host-names /etc/mail/access 打开sendmail.mc,搜索”127.0.0.1″,找到如下代码; DAEMON_OPTIONS (`Port=smtp,Addr=127.0.0.1,Name=MTA’

首发:http://www.chuiniudi.cn/archives/66

基本配置需要修改的配置文件:

/etc/mail/sendmail.mc

/etc/mail/local-host-names

/etc/mail/access

打开sendmail.mc,搜索”127.0.0.1″,找到如下代码;

DAEMON_OPTIONS (`Port=smtp,Addr=127.0.0.1,Name=MTA’)

修改为:

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

监听所有IP地址

搜索”MD5″,找到如下代码:

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

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

去掉这两行前面的”dnl”,后面的dnl保留.

在shell下执行命令:m4 sendmail.mc > sendmail.cf

在local-host-names 中添加邮件服务所使用的域名,比如有账户zbwz@chuiniudi.cn,这里面就填test.com,一个域名占一行,域名最后不用加”.”,域名要解析要sendmail服务器的IP.

最后就是access文件,这个文件只有跨服务器发送邮件时才会用到.

比如我现在的sendmail服务器S1的IP为”192.168.1.2″,另外一台sendmail服务器S2的IP为”192.168.2.2″,要用S1上的一个邮箱帐号向S2服务器上的邮箱帐号发送邮件.在S2上就需要修改access文件了,在access文件中添加如下内容:

192.168.1.2                                 RELAY

中继来自192.168.1.2的邮件.

保存一下,然后在shell中执行命令:

makemap hash access.db

最终sendmail程序要用到的还是access.db文件,所以这里要把access文件转换为access.db文件.

access文件中其他的一些选项:

192.168.1            REJACK(拒绝)

192.168.1.2        OK(绝对允许,完全信任该IP)

这里的IP可以使一个IP地址,也可以是一个网段.

两台sendmail服务器之间发送邮件需要注意的一些问题:

两台sendmail服务器的主机名不可为localhost.localdomain(默认的主机名).

需要修改配置文件:/etc/sysconfig/network.或者直接在”网络”里修改,修改后重启网卡,打开/etc/hosts.里面的内容为不能包含新的主机名.

telnet到Sendmail服务器的25端口,这里的主机名不为localhost.localdomain时,两台Sendmail就可以互发邮件了.

DNS服务器里一定要做好相应的A记录和MX记录.

以服务器S1为例:域名为chuiniudi.cn

在dns服务器中建立如下记录:

@    IN    A    192.168.1.2

mail    IN    A    192.168.1.2

@    IN    MX    10    mail

群发功能的实现:

实现向team1发送邮件 People[1-3]都能收到

打开/etc/aliases文件.添加如下内容:

team1:           People1,People2,People3

team2:           People4,People5,People6

这里的team[1-2],People[1-6]都是真实用户.需要用useradd命令创建

新建Sendmail用户时,如果不希望该用户登陆到系统,可以使用如下命令添加用户:

useradd 用户名 -s /sbin/nologin

照这样配置好后,Sendmail服务器就可以进行最基本的收发邮件工作了

http://zserver.blog.51cto.com/370152/156419

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