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    Failed to send email via SMTP

    User help
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    • J
      Jenny
      last edited by

      Your help in this issue has been very very useful.
      Please suggest me to improve this SMTP issue.
      Error Message as below:
      Failed to send email titled "Mango test email" to "aji@***.com".
      Message: "Mail server connection failed; nested exception is javax.mail.MessagingException: Could not convert socket to TLS; nested exception is: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target. Failed messages: javax.mail.MessagingException: Could not convert socket to TLS; nested exception is: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target"

      MangoOS version 3.7.11
      Java version jdk-8u311-linux-x64 or openjdk-8-jdk
      mail server on MS Exchange Server 2016
      TLS Crypt port 587
      Use authorization

      With my best regards,

      Jenny

      1 Reply Last reply Reply Quote 0
      • J
        Jenny
        last edited by

        Hi!

        This issue was solved today.
        The Exchange 2016 server opened port 25 with TLS.
        Tested mail was sent success.

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