3566024 - com.sun.mail.smtp.SMTPSendFailedException: 530 Authentication required

You have configured Message Alert Job via SMTP connection as per Michal's PI tips: Component-Based Message Alerting 

Intermittently, alerts are not sent.

When collecting XPI Inspector traces or default traces, you can see the following error;

[EXCEPTION]
com.sun.mail.smtp.SMTPSendFailedException: 530 Authentication required

at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2374)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1808)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1285)
at com.sap.aii.alert.consumer.job.AlertConsumerJob.sendMail(AlertConsumerJob.java:202)
at com.sap.aii.alert.consumer.job.AlertConsumerJob.generateAndSendMailReports(AlertConsumerJob.java:428)
at com.sap.aii.alert.consumer.job.AlertConsumerJob.onJob(AlertConsumerJob.java:103)
at com.sap.engine.services.scheduler.runtime.mdb.MDBJobDelegateImpl$1.run(MDBJobDelegateImpl.java:678)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
[...]

SAP NetWeaver 7.5

Message, Alert Job, Alert, email, SMTP, Component-Based Message Alerting, CBMA, com.sun.mail.smtp.SMTPSendFailedException:, 530 Authentication required, com.sun.mail.smtp.SMTPTransport.issueSendCommand,com.sun.mail.smtp.SMTPTransport.mailFrom,


  , KBA , BC-XI-ALR-CBA-JAV , Java , Problem