com.sun.mail.smtp.SMTPSendFailedException: 421 mailer.hnwmail.com Error: timeout exceeded

mulesoft.org | 4 months ago
  1. 0

    [MULE-1750] SMTP Connector continuously fails if the connection has timed out - JIRA

    mulesoft.org | 4 months ago
    com.sun.mail.smtp.SMTPSendFailedException: 421 mailer.hnwmail.com Error: timeout exceeded
  2. 0

    Domain of sender address does not exist

    Oracle Community | 8 years ago | 746591
    com.sun.mail.smtp.SMTPSendFailedException: 553 5.1.8 ... Domain of sender address Company@abcdef123 does not exist
  3. 0

    Must issue a STARTTLS command first. - gsmtp ; Sending email with attachment using gmail account

    Stack Overflow | 2 years ago | SaRak
    com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first. of6sm3574020lbb.11 - gsmtp
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  5. 0

    How to send an email using MS exchange server

    Stack Overflow | 6 years ago | user509755
    com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.1 Client was not authenticated
  6. 0

    550 Access denied - Invalid HELO name

    Stack Overflow | 5 years ago | Abhishek
    org.apache.commons.mail.EmailException: Sending the e mail to the following server failed : mail.just-flick.com:25

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Root Cause Analysis

  1. com.sun.mail.smtp.SMTPSendFailedException

    421 mailer.hnwmail.com Error: timeout exceeded

    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. org.mule.providers
    AbstractMessageDispatcher$Worker.run
    1. org.mule.providers.email.SmtpMessageDispatcher.sendMailMessage(SmtpMessageDispatcher.java:130)
    2. org.mule.providers.email.SmtpMessageDispatcher.doDispatch(SmtpMessageDispatcher.java:94)
    3. org.mule.providers.AbstractMessageDispatcher$Worker.run(AbstractMessageDispatcher.java:561)
    3 frames
  4. org.mule.impl
    WorkerContext.run
    1. org.mule.impl.work.WorkerContext.run(WorkerContext.java:310)
    1 frame
  5. Backport of JSR 166
    ThreadPoolExecutor$Worker.run
    1. edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:987)
    2. edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:528)
    2 frames
  6. Java RT
    Thread.run
    1. java.lang.Thread.run(Thread.java:613)
    1 frame