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  1. ,
    via Stack Overflow by carlos

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

  2. ,
    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

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via Stack Overflow by Veeresh123
, 1 year ago
Exception reading response; 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
via Google Groups by Kordian, 8 months ago
Exception reading response; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
via Oracle Community by 843834, 1 year ago
Exception reading response; nested exception is: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
via Coderanch by dinesh Venkatesan, 1 year ago
Exception reading response; nested exception is: java.net.SocketException: Connection reset
via Oracle Community by Saroja Kandepuneni-Oracle, 1 year ago
Exception reading response; nested exception is: java.net.SocketException: Connection reset
via Coderanch by Ram Sateesh Talari, 1 year ago
Exception reading response; nested exception is: java.net.SocketException: Connection reset
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:318)	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:217)	at sun.security.validator.Validator.validate(Validator.java:218)	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1185)	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:136)	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:925)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1170)	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:785)	at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)	at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:110)	at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)	at java.io.BufferedInputStream.read(BufferedInputStream.java:237)	at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:88)	at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1589)	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1369)	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)	at javax.mail.Service.connect(Service.java:310)	at javax.mail.Service.connect(Service.java:169)	at javax.mail.Service.connect(Service.java:118)	at javax.mail.Transport.send0(Transport.java:188)	at javax.mail.Transport.send(Transport.java:118)	at com.demo.MySendMails.sendMail(MySendMails.java:477)	at com.demo.MySendMails.BirthDayMail(MySendMails.java:291)	at com.demo.MySendMails.main(MySendMails.java:535)