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  1. ,
    Expert tip

    If you're using wiremock, configure your code to accept wiremock self-signed certificate or create a keystore and certificate that are trusted by your HTTP client and configure wiremock to use that

  2. ,
    via Stack Overflow by carlos

    Set the mail.smtp.ssl.trust system property to an smtp host, like smtp.gmail.com.

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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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sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
via knowcoding.com by Unknown author, 2 years ago
sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)	at sun.security.validator.Validator.validate(Validator.java:260)	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1323)	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1884)	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)	at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1339)	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1323)	at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:532)	at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:469)	at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1925)	at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1930)	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:668)	at javax.mail.Service.connect(Service.java:367)	at javax.mail.Service.connect(Service.java:226)	at javax.mail.Service.connect(Service.java:175)	at javax.mail.Transport.send0(Transport.java:253)	at javax.mail.Transport.send(Transport.java:124)	at com.affiliate.DTO.ConfirmationMail.sendMail(ConfirmationMail.java:51)