1. 申请电子邮箱 2. 设置登陆密码： 3. 设置客户端授权码：   4. 发送邮件 ~~~ [root@iZ23w9ljtgdZ ~]# echo "hello,this is the content of mail. welcome to linuxde mail" | mail -s "Hello from linux." amamatthew@outlook.com [root@iZ23w9ljtgdZ ~]# ~~~  ~~~ [root@iZ23w9ljtgdZ ~]# echo 123 | mailx -v -s "test" amamatthew@outlook.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 iZ23w9ljtgdZ 250-mail 250-PIPELINING 250-AUTH LOGIN PLAIN 250-AUTH=LOGIN PLAIN 250-coremail 1Uxr2xKj7kG0xkI17xGrU7I0s8FY2U3Uj8Cz28x1UUUUU7Ic2I0Y2UrZpwPbUCa0xDrUUUUj 250-STARTTLS 250 8BITMIME >>> AUTH LOGIN 334 dXNlcm5hbWU6 >>> c210cF9mb3JfZW1haWxAMTYzLmNvbQ== 334 UGFzc3dvcmQ6 >>> dG9zbXRwMjAxOA== 235 Authentication successful >>> MAIL FROM:<smtp_for_email@163.com> 250 Mail OK >>> RCPT TO:<amamatthew@outlook.com> 250 Mail OK >>> DATA 354 End data with <CR><LF>.<CR><LF> >>> . 250 Mail OK queued as smtp12,EMCowABnz04TdidbFO+MDg--.48509S2 1529312787 >>> QUIT 221 Bye [root@iZ23w9ljtgdZ ~]# ~~~