By following all the steps mentioned in this POST; I am able to send emails programmatically from my android device using gmail credentials. But as soon as I switch to a third party SMTP provider (provided by my ISP), the program starts to throw the following exception:
javax.mail.MessagingException: Could not connect to SMTP host: cp-10.webhostbox.net, port: 465;
nested exception is:
javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1391)
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.**.oms.utils.GMailSender.sendMail(GMailSender.java:66)
at com.**.oms.NewUserSignUp$1.run(NewUserSignUp.java:58)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:409)
at com.android.org.conscrypt.OpenSSLSocketImpl$SSLInputStream.<init>(OpenSSLSocketImpl.java:661)
at com.android.org.conscrypt.OpenSSLSocketImpl.getInputStream(OpenSSLSocketImpl.java:632)
at com.sun.mail.smtp.SMTPTransport.initStreams(SMTPTransport.java:1449)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1366)
... 12 more
Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
at com.android.org.conscrypt.TrustManagerImpl.checkTrusted(TrustManagerImpl.java:282)
at com.android.org.conscrypt.TrustManagerImpl.checkServerTrusted(TrustManagerImpl.java:202)
at com.android.org.conscrypt.OpenSSLSocketImpl.verifyCertificateChain(OpenSSLSocketImpl.java:611)
at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:405)
... 16 more
Caused by: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
... 21 more
Below mentioned is the set of properties that I am setting (including the one to accept all the certificates):
Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", mailhost);
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.debug", "true");
props.put("mail.smtp.port", "465");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.ssl.checkserveridentity", false);
props.setProperty("mail.smtp.ssl.trust", "*");
props.put("mail.smtp.starttls.enable", true);
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.quitwait", "false");
As you can see I am already accepting all the certificates, still am getting this certificate error. Can someone please explain this behavior and the solution to the same.
