1、vpn设备上抓包以及检查系统日志,发送测试短信时候,邮箱服务器返回的535
[ALARMMAIL] SMTP.cpp:321, Receive Send Password state error, Server saied: 535 Error: authentication failed

2、网上检索163邮箱新邮箱,开启了授权码情况下会有这种提示http://www.yilingsj.com/xwzj/2016-04-01/381.html
3、后面客户的邮箱服务器的密码为授权码后正常发送邮件