我创建了一个使用 javax.mail-1.6.2.jar 发送邮件的 JAVA 应用程序。 邮件使用TLS 1.2版本正常发送，但是1个月后发送邮件出现如下错误
每个月都会发生。推测证书已过期。 我应该检查哪一部分？不知道是我程序的问题还是客户邮件服务器的问题
javax.mail.MessagingException: Could not convert socket to TLS;
nested exception is:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: Algorithm constraints check failed on signature algorithm: SHA256WithRSAEncryption
at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:2155)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:752)
at javax.mail.Service.connect(Service.java:366)
at javax.mail.Service.connect(Service.java:246)
at Motive.Extension.PluginProcess.EmailWorkProcess.EmailWorkProcess.sendEmail(EmailWorkProcess.java:342)
at Motive.Extension.PluginProcess.EmailWorkProcess.EmailWorkProcess.access$300(EmailWorkProcess.java:73)
at Motive.Extension.PluginProcess.EmailWorkProcess.EmailWorkProcess$EmailSendThread.run(EmailWorkProcess.java:714)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: Algorithm constraints check failed on signature algorithm: SHA256WithRSAEncryption
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1959)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1514)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:961)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1072)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:626)
at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:553)
at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:2150)
... 6 more
Caused by: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: Algorithm constraints check failed on signature algorithm: SHA256WithRSAEncryption
at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:362)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:270)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1496)
... 16 more
Caused by: java.security.cert.CertPathValidatorException: Algorithm constraints check failed on signature algorithm: SHA256WithRSAEncryption
at org.bouncycastle.jce.provider.RFC3280CertPathUtilities.prepareNextCertO(Unknown Source)
at org.bouncycastle.jce.provider.PKIXCertPathValidatorSpi.engineValidate(Unknown Source)
at java.security.cert.CertPathValidator.validate(CertPathValidator.java:292)
at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:357)
... 22 more
我正在使用 bcprov-jdk15on-1.54.jar。我打算删除这个文件并更新它。