CentOS下配置SMTP

在服务器上配置一个SMTP邮件服务可能是在日常工作中经常会遇到的需要，比如在做一些简单测试的时候。

配置步骤无比简单，废话不说：

1，yum -y install mail

2，编辑/etc/mail.rc，配置一些smtp相关内容

3，没有了...

安装mail

详细输出过程，记录如下

[root@thatsit ~]# yum -y install mail
已加载插件:fastestmirror
设置安装进程
Loading mirror speeds from cached hostfile
Could not get metalink https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=x86_64 error was
14: Peer cert cannot be verified or peer cert invalid
* base: mirrors.yun-idc.com
* epel: mirror.lzu.edu.cn
* extras: mirrors.yun-idc.com
* updates: mirrors.yun-idc.com
base | 3.7 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
解决依赖关系
--> 执行事务检查
---> Package mailx.x86_64 0:12.4-8.el6_6 will be 安装
--> 完成依赖关系计算

依赖关系解决

===============================================================================================================================================================================================
软件包 架构 版本 仓库 大小
===============================================================================================================================================================================================
正在安装:
mailx x86_64 12.4-8.el6_6 base 235 k

事务概要
===============================================================================================================================================================================================
Install 1 Package(s)

总下载量:235 k
Installed size: 452 k
下载软件包:
mailx-12.4-8.el6_6.x86_64.rpm | 235 kB 00:00
运行 rpm_check_debug
执行事务测试
事务测试成功
执行事务
正在安装 : mailx-12.4-8.el6_6.x86_64 1/1
warning: /etc/mail.rc created as /etc/mail.rc.rpmnew
Verifying : mailx-12.4-8.el6_6.x86_64 1/1

已安装:
mailx.x86_64 0:12.4-8.el6_6

完毕！
[root@thatsit ~]#　　

配置SMTP

[root@shipeng01 ~]# vim /etc/mail.rc
[root@thatsit ~]# cat /etc/mail.rc
set from=my_test_mail_address@163.com
set smtp=smtp.163.com
set smtp-auth-user=my_test_mail_address
set smtp-auth-password=passwd_of_my_test_mail_address123
set smtp-auth=login
[root@thatsit ~]#

测试

[root@thatsit ~]# echo "hehe" | mailx -v -s "test" my_qq_number@qq.com
Resolving host smtp.163.com . . . done.
Connecting to 220.181.12.16 . . . connected.
220 163.com Anti-spam GT for Coremail System (163com[20141201])
>>> EHLO thatsit
250-mail
250-PIPELINING
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-coremail 1Uxr2xKj7kG0xkI17xGrU7I0s8FY2U3Uj8Cz28x1UUUUU7Ic2I0Y2UrKfWhDUCa0xDrUUUUj
250-STARTTLS
250 8BITMIME
>>> AUTH LOGIN
334 dXNlcm5hbWU6
>>> dGhhdHNtYWls
334 UGFzc3dvcmQ6
>>> IUAjdGhhdHNtYWlsMTIz
235 Authentication successful
>>> MAIL FROM:<my_test_mail_address@163.com>
250 Mail OK
>>> RCPT TO:<my_qq_number@qq.com>
250 Mail OK
>>> DATA
354 End data with <CR><LF>.<CR><LF>
>>> .
250 Mail OK queued as smtp12,EMCowADX78NadypYg6vqDA--.33888S2 1479178081
>>> QUIT
221 Bye
[root@thatsit ~]#

mailx和mail的关系

这里大家可能也看到了，上面测试命令里用了mailx，跟有些文档里用的mail命令不一样，那么这两者之间的关系是什么呢？我们来看一下：

[root@thatsit ~]# which mail
/bin/mail
[root@thatsit ~]# ll /bin/mail
lrwxrwxrwx 1 root root 22 11月 15 10:47 /bin/mail -> /etc/alternatives/mail
[root@thatsit ~]# ll /etc/alternatives/mail
lrwxrwxrwx 1 root root 10 11月 15 10:47 /etc/alternatives/mail -> /bin/mailx
[root@thatsit ~]#

大家也看到了，其实mail就是mailx软链的软链。因此在使用上，这两个命令一样的：

[root@thatsit ~]# echo "hehe" | mail -v -s "test" my_qq_number@qq.com
Resolving host smtp.163.com . . . done.
Connecting to 220.181.12.11 . . . connected.
220 163.com Anti-spam GT for Coremail System (163com[20141201])
>>> EHLO thatsit
250-mail
250-PIPELINING
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-coremail 1Uxr2xKj7kG0xkI17xGrU7I0s8FY2U3Uj8Cz28x1UUUUU7Ic2I0Y2UFbVUZKUCa0xDrUUUUj
250-STARTTLS
250 8BITMIME
>>> AUTH LOGIN
334 dXNlcm5hbWU6
>>> dGhhdHNtYWls
334 UGFzc3dvcmQ6
>>> IUAjdGhhdHNtYWlsMTIz
235 Authentication successful
>>> MAIL FROM:<my_test_mail_address@163.com>
250 Mail OK
>>> RCPT TO:<my_qq_number@qq.com>
250 Mail OK
>>> DATA
354 End data with <CR><LF>.<CR><LF>
>>> .
250 Mail OK queued as smtp7,C8CowAD3FNqqeSpYj9soDQ--.40085S2 1479178674
>>> QUIT
221 Bye
[root@thatsit ~]# 

两封测试邮件的截图如下

DONE