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问题描述：xxlJob配置163邮箱发送邮件，配置简单如下，发生问题SMTPSendFailedException: 554 DT:SPM
### xxl-job email
xxl.job.mail.host=smtp.163.com
xxl.job.mail.port=25
xxl.job.mail.ssl=false
xxl.job.mail.username=m1531168781153@163.com
##password是网易邮箱授权码具体操作百度一下
xxl.job.mail.password=1qaz2wsx11
xxl.job.mail.sendNick=122311111JOBorg.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.163.com:25at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1469)at org.apache.commons.mail.Email.send(Email.java:1496)at com.xxl.job.admin.core.util.MailUtil.sendMail(MailUtil.java:57)at com.xxl.job.admin.core.thread.JobFailMonitorHelper.failAlarm(JobFailMonitorHelper.java:193)at com.xxl.job.admin.core.thread.JobFailMonitorHelper.access$400(JobFailMonitorHelper.java:26)at com.xxl.job.admin.core.thread.JobFailMonitorHelper$1.run(JobFailMonitorHelper.java:84)at java.lang.Thread.run(Thread.java:745)
Caused by: com.sun.mail.smtp.SMTPSendFailedException: 554 DT:SPM 163 smtp5,D9GowADnzvNE02NccalxBA--.9S2 1550046020,please see http://mail.163.com/help/help_spam_16.htm?ip=124.65.192.162&hostid=smtp5&time=1550046020at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2358)at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:2110)at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1316)at javax.mail.Transport.send0(Transport.java:255)at javax.mail.Transport.send(Transport.java:124)at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1459)... 6 common frames omitted
16:20:19.921 logback [Thread-34] INFO c.x.j.a.c.t.JobFailMonitorHelper - >>>>>>>>>>> job monitor, job fail, JobLogId:146查询网易邮箱错误说明：
•554 DT:SPM 发送的邮件内容包含了未被许可的信息，或被系统识别为垃圾邮件。请检查是否有用户发送病毒或者垃圾邮件；
开始以为是乱码问题，但最后调试了很久发现主要原因是发送邮件的subject名称是调度中心监控报警，因为有报警两个字，没错就是这两个字一直发送失败！！！！！它特么是不被许可的！！！！
最后修改message.properties文件中配置项jobconf_monitor就可以了。诸君好运，不要遇到类似问题。
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