com.sun.mail.smtp.SMTPSendFailedException: 550 SMTP authentication mandatory

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via Stack Overflow by Magico
, 1 year ago
550 SMTP authentication mandatory
via liferay.com by Unknown author, 1 year ago
550 5.7.1 Initial access check failure_ [Sanitized]
via liferay.com by Unknown author, 1 year ago
550 5.7.1 Initial access check failure_ [Sanitized]
via liferay.com by Unknown author, 2 years ago
550 5.7.1 Initial access check failure_ [Sanitized]
via Stack Overflow by dan coleman
, 2 years ago
530 5.5.1 Authentication Required
via Oracle Community by 800404, 1 year ago
530 5.5.1 Authentication Required 36sm1890857huc
com.sun.mail.smtp.SMTPSendFailedException: 550 SMTP authentication mandatory
at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1388)
at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:959)
at com.MailerPecUtility.sendMail(MailerPecUtility.java:201)
at com.MailerPecUtility.main(MailerPecUtility.java:266)

Users with the same issue

Once, 8 months ago
4884 times, 1 year ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago
Samebug visitor profile picture
Unknown user
Once, 1 year ago

Write tip

Know the solutions? Share your knowledge to help other developers to debug faster.