centos7操作系统
1、配置Linux客户端邮件发送功能
[root@www script] vim /etc/mail.rc
在文件中添加如下：
set from=1665***913@qq.com
set smtp=smtp.qq.com
set smtp-auth-user=1665***913@qq.com
set smtp-auth-password=yslsnzvgqqtadhee （QQ邮箱授权码，需要开启pop3和smtp就会生成）
set smtp-auth=login
2、测试下是否可以使用
echo "测试邮件" | mail -s "测试" *********@qq.com
测试发现有时能发送，有时会退信并报以下错误：
[root@www script]# smtp-server: 530 Error: A secure connection is requiered(such as ssl). More information at http://service.mail.qq.com/cgi-bin/help?id=28
"/root/dead.letter" 11/325
. . . message not sent.
3、添加以下配置文件参数
set from=1665***913@qq.com
set smtp=smtp.qq.com
set smtp-auth-user=1665***913@qq.com
set smtp-auth-password=yslsnzvgqqtadhee QQ邮箱授权码，需要开启pop3和smtp就会生成
set smtp-auth=login
##########################################
set smtp-use-starttls （后面加上生成的pop3或smtp授权码）
set ssl-verify=ignore （后面加上生成的pop3或smtp授权码）
set nss-config-dir=/etc/pki/nssdb/ （后面加上生成的pop3或smtp授权码）
再次出现错误，错误信息为：
535 Error: http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256
smtp-server: 535 Error:
http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256
"/root/dead.letter" 11/307
. . . message not sent.
解决办法：
在QQ邮箱首页点击，设置→账户→POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务，开启POP3/SMTP服务即可解决问题。
再次测试发送邮件，邮件发送成功......
[root@www script]# cat /tmp/jiankong.log |mailx -v -s ‘hello‘ ‘1665***913@qq.com‘
Resolving host smtp.qq.com . . . done.
Connecting to 14.17.57.241 . . . connected.
220 smtp.qq.com Esmtp QQ Mail Server
>>> EHLO www.net-leader.com.cn
250-smtp.qq.com
250-PIPELINING
250-SIZE 73400320
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
>>> STARTTLS
220 Ready to start TLS
Error in certificate: Peer‘s certificate issuer is not recognized.
Comparing DNS name: "upload.mail.qq.com"
Comparing DNS name: "hwsmtp.exmail.qq.com"
Comparing DNS name: "hwimap.exmail.qq.com"
Comparing DNS name: "cloudmx.qq.com"
Comparing DNS name: "imap.exmail.qq.com"
Comparing DNS name: "hwpop.exmail.qq.com"
Comparing DNS name: "smtp.qq.com"
SSL parameters: cipher=AES-256, keysize=256, secretkeysize=256,
issuer=CN=GeoTrust SSL CA - G3,O=GeoTrust Inc.,C=US
subject=CN=pop.qq.com,OU=R&D,O=Shenzhen Tencent Computer Systems Company Limited,L=Shenzhen,ST=Guangdong,C=CN
>>> EHLO www.net-leader.com.cn
250-smtp.qq.com
250-PIPELINING
250-SIZE 73400320
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
>>> AUTH LOGIN
334 VXNlcm5hbWU6
>>> MTY2NTExMTkxM0BxcS5jb20=
334 UGFzc3dvcmQ6
>>> eXNsc256dmdxcXRhZGhlZQ==
235 Authentication successful
>>> MAIL FROM:<1665111913@qq.com>
250 Ok
>>> RCPT TO:<1665111913@qq.com>
250 Ok
>>> DATA
354 End data with <CR><LF>.<CR><LF>
>>> .
250 Ok: queued as
>>> QUIT
221 Bye
这样就不会报错，能成功发送邮件了。
本文出自 “每天一小步” 博客，请务必保留此出处http://fenyuer.blog.51cto.com/11265169/1917019