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

Stack Overflow | Magico | 5 months ago
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    Java Mail Error: 550 SMTP authentication

    Stack Overflow | 5 months ago | Magico
    com.sun.mail.smtp.SMTPSendFailedException: 550 SMTP authentication mandatory
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    Stack Overflow | 8 months ago | David Leonardo Crespín
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    Domain of sender address does not exist

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    com.sun.mail.smtp.SMTPSendFailedException: 553 5.1.8 ... Domain of sender address Company@abcdef123 does not exist
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    mulesoft.org | 6 months ago
    com.sun.mail.smtp.SMTPSendFailedException: 421 mailer.hnwmail.com Error: timeout exceeded
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    Must issue a STARTTLS command first. - gsmtp ; Sending email with attachment using gmail account

    Stack Overflow | 2 years ago | SaRak
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Root Cause Analysis

  1. com.sun.mail.smtp.SMTPSendFailedException

    550 SMTP authentication mandatory

    at com.sun.mail.smtp.SMTPTransport.issueSendCommand()
  2. JavaMail API (compat)
    SMTPTransport.sendMessage
    1. com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1388)
    2. com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:959)
    3. com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:583)
    3 frames
  3. finagle-core
    MailerPecUtility.main
    1. com.MailerPecUtility.sendMail(MailerPecUtility.java:201)
    2. com.MailerPecUtility.main(MailerPecUtility.java:266)
    2 frames