Java邮件：在没有SSL的端口25上发送电子邮件时发生SSLHandshakeException异常
问题描述：
尽管我试图在没有SSL的端口25上发送电子邮件，但我收到了SSLHandshakeException。您可以在下面看到由javax.mail.Session和SSLHandshakeException打印的调试消息。Java邮件：在没有SSL的端口25上发送电子邮件时发生SSLHandshakeException异常
你能帮我理解发生了什么吗？
22 Dec 2009 15:13:21,054 INFO root:197 - DEBUG: setDebug: JavaMail version 1.4ea
22 Dec 2009 15:13:21,059 INFO root:197 - DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
22 Dec 2009 15:13:21,103 INFO root:197 - DEBUG SMTP: useEhlo true, useAuth false
22 Dec 2009 15:13:21,103 INFO root:197 - DEBUG SMTP: trying to connect to host "mail.abcdef.com", port 25, isSSL false
22 Dec 2009 15:13:21,338 INFO root:197 - 220 mail.uvwxyz.com ESMTP abcdef Mail Server v8.0; Tue, 22 Dec 2009 15:12:10 -0700
22 Dec 2009 15:13:21,338 INFO root:197 - DEBUG SMTP: connected to host "mail.abcdef.com", port: 25
22 Dec 2009 15:13:21,342 INFO root:197 - EHLO fsb160
22 Dec 2009 15:13:21,383 INFO root:197 - 250-mail.uvwxyz.com Hello fsb160 [65.124.157.54], pleased to meet you.
250-ENHANCEDSTATUSCODES
250-SIZE
250-EXPN
250-ETRN
250-ATRN
250-DSN
250-CHECKPOINT
250-8BITMIME
250-AUTH CRAM-MD5 DIGEST-MD5 LOGIN PLAIN
250-AUTH=LOGIN
250-STARTTLS
250 HELP
22 Dec 2009 15:13:21,383 INFO root:197 - DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
22 Dec 2009 15:13:21,383 INFO root:197 - DEBUG SMTP: Found extension "SIZE", arg ""
22 Dec 2009 15:13:21,384 INFO root:197 - DEBUG SMTP: Found extension "EXPN", arg ""
22 Dec 2009 15:13:21,384 INFO root:197 - DEBUG SMTP: Found extension "ETRN", arg ""
22 Dec 2009 15:13:21,384 INFO root:197 - DEBUG SMTP: Found extension "ATRN", arg ""
22 Dec 2009 15:13:21,384 INFO root:197 - DEBUG SMTP: Found extension "DSN", arg ""
22 Dec 2009 15:13:21,385 INFO root:197 - DEBUG SMTP: Found extension "CHECKPOINT", arg ""
22 Dec 2009 15:13:21,385 INFO root:197 - DEBUG SMTP: Found extension "8BITMIME", arg ""
22 Dec 2009 15:13:21,385 INFO root:197 - DEBUG SMTP: Found extension "AUTH", arg "CRAM-MD5 DIGEST-MD5 LOGIN PLAIN"
22 Dec 2009 15:13:21,385 INFO root:197 - DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
22 Dec 2009 15:13:21,386 INFO root:197 - DEBUG SMTP: Found extension "STARTTLS", arg ""
22 Dec 2009 15:13:21,386 INFO root:197 - DEBUG SMTP: Found extension "HELP", arg ""
22 Dec 2009 15:13:21,389 INFO root:197 - STARTTLS
22 Dec 2009 15:13:21,430 INFO root:197 - 220 2.0.0 Ready to start TLS
22 Dec 2009 15:13:21,809 INFO root:197 - EHLO fsb160
22 Dec 2009 15:13:21,886 WARN E:314 - Failed to send email
javax.mail.MessagingException: Can't send command to SMTP host;
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
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1420)
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1408)
at com.sun.mail.smtp.SMTPTransport.ehlo(SMTPTransport.java:847)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:384)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at java.lang.Thread.run(Unknown Source)
Caused by: 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
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Unknown Source)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)
at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)
at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.AppOutputStream.write(Unknown Source)
at com.sun.mail.util.TraceOutputStream.write(TraceOutputStream.java:101)
at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
at java.io.BufferedOutputStream.flush(Unknown Source)
at com.sun.mail.smtp.SMTPTransport.sendCommand(SMTPTransport.java:1418)
... 7 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
at sun.security.validator.Validator.validate(Unknown Source)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(Unknown Source)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
... 19 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
at java.security.cert.CertPathBuilder.build(Unknown Source)
... 25 more
用于创建会话和连接到服务器的代码：
Session session = EmailUtilities.createSession(smtpServer, smtpPort, smtpSSL, smtpAuthentication);
Transport transport = session.getTransport();
transport.connect(smtpServer, smtpUser, smtpPassword);
try {
MimeMessage message = EmailUtilities.createMessage(Main.APPLICATION_NAME + " " + Main.APPLICATION_VERSION, session, to, from, subject, body, attachmentName, attachment, "application/pdf");
transport.sendMessage(message, message.getAllRecipients());
} catch (Exception e) {
throw new Exception(e);
} finally {
transport.close();
}
public static Session createSession(String smtpServer, Integer smtpPort, boolean ssl, boolean authenticate) {
String protocol = "smtp"; //$NON-NLS-1$
if (ssl) {
protocol = "smtps"; //$NON-NLS-1$
}
// -- Attaching to default Session, or we could start a new one --
Properties props = new Properties();
props.put("mail.transport.protocol", protocol);
props.put("mail." + protocol + ".host", smtpServer);
props.put("mail." + protocol + ".port", smtpPort.toString());
props.put("mail." + protocol + ".starttls.enable", Boolean.TRUE.toString());
if (authenticate) {
props.put("mail." + protocol + ".auth", Boolean.TRUE.toString());
}
Session session = Session.getDefaultInstance(props, null);
session.setDebug(true);
return session;
}
你能告诉你的代码？ – notnoop
这也有助于了解您正在使用哪个JavaMail实现和版本。 –
@notnoop我刚刚用我用来创建会话和连接到服务器的代码更新了问题。 @Jim我正在使用Java邮件1.4。 – Nicu