javax.mail.MessagingException: Could not connect to SMTP host: mail.host.com, port: 465; 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

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    javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465; 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

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Root Cause Analysis

  1. sun.security.provider.certpath.SunCertPathBuilderException

    unable to find valid certification path to requested target

    at sun.security.provider.certpath.SunCertPathBuilder.build()
  2. Java RT
    Validator.validate
    1. sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145)
    2. sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
    3. java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
    4. sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
    5. sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
    6. sun.security.validator.Validator.validate(Validator.java:260)
    6 frames
  3. Java JSSE
    SSLSocketImpl.startHandshake
    1. sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
    2. sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
    3. sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
    4. sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1460)
    5. sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:212)
    6. sun.security.ssl.Handshaker.processLoop(Handshaker.java:957)
    7. sun.security.ssl.Handshaker.process_record(Handshaker.java:892)
    8. sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1050)
    9. sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1363)
    10. sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1391)
    11. sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1375)
    11 frames
  4. JavaMail API (compat)
    SMTPTransport.protocolConnect
    1. com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549)
    2. com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:354)
    3. com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:211)
    4. com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)
    5. com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)
    5 frames
  5. JavaMail API
    Service.connect
    1. javax.mail.Service.connect(Service.java:295)
    2. javax.mail.Service.connect(Service.java:176)
    2 frames
  6. scam
    ccChecker$sendEmail.run
    1. scam.ccChecker$sendEmail.run(ccChecker.java:186)
    1 frame
  7. Java RT
    Thread.run
    1. java.lang.Thread.run(Thread.java:745)
    1 frame