我的 Java 程序停止使用我的 gmail 帐户发送电子邮件 [英] My Java program stopped sending emails using my gmail Account
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问题描述
我在这里和其他地方搜索了几个相关的帖子，但没有一个能解决我的问题.我有一个使用javamail API"向一组人发送电子邮件的程序.它曾经工作得很好.今天我又需要了，但我无法发送任何电子邮件...我的 sendEmail 方法如下:
I searched several related posts here and in other places, but none of them solved my problem. I have a program that sends emails to a set of people using "javamail API". It worked fine once. Today I needed again, but I cannot send any email... My sendEmail method is the following:
public void sendEmail(String userName, String password, String toAddress,
String subject, String message, String[] attachFiles)
throws AddressException, MessagingException {
// sets SMTP properties
Properties properties = new Properties();
properties.put("mail.smtp.host", "smtp.gmail.com");
properties.put("mail.smtp.port", "587");
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.user", userName);
properties.put("mail.password", password);
// creates a new session with an authenticator
Authenticator auth = new SMTPAuthenticator(userName, password);
Session session = Session.getInstance(properties, auth);
// creates a new e-mail message
MimeMessage msg = new MimeMessage(session);
try {
msg.setFrom(new InternetAddress(userName, "My name"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
InternetAddress[] toAddresses = {new InternetAddress(toAddress)};
msg.setRecipients(Message.RecipientType.TO, toAddresses);
msg.setSubject(subject);
msg.setSentDate(new Date());
// creates message part
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(message, "text/html");
// creates multi-part
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
// adds attachments
if (attachFiles != null && attachFiles.length > 0) {
for (String filePath : attachFiles) {
addAttachment(multipart, filePath);
}
}
// sets the multi-part as e-mail's content
msg.setContent(multipart);
// sends the e-mail
Transport.send(msg);
}
所以，现在尝试调用此方法时出现以下错误(我使用的是 jdk 1.7.0_21):
So, now the attempt to call this method I got the following error (I'm using jdk 1.7.0_21):
Sending email Failed...
javax.mail.MessagingException: Could not convert socket to TLS;
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.startTLS(SMTPTransport.java:1907)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:666)
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 EmailSender.sendEmail(EmailSender.java:86)
at CFP_LaWasp_EmailSender.sendCFPLaWasp(CFP_LaWasp_EmailSender.java:178)
at CFP_LaWasp_EmailSender.main(CFP_LaWasp_EmailSender.java:220)
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 sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1886)
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:528)
at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:465)
at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:1902)
... 9 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(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)
... 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(SunCertPathBuilder.java:196)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
... 25 more
我不知道如何解决这个问题，因为它以前可以工作......另外，我不知道我的 Gmail 是否与此有关(如果它阻止了此访问......)
I don't know how to solve this issue, since it used to work before... Also, I don't know if my Gmail has something to do with this (if it blocked this access...)
感谢您的帮助.
推荐答案
关键错误是这样的:
原因:sun.security.provider.certpath.SunCertPathBuilderException:无法找到请求目标的有效证书路径
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
由于您要连接到 Gmail，因此不应发生这种情况.最可能的原因是:
Since you're connecting to Gmail, this shouldn't happen. The most likely causes are:
- 有防火墙或防病毒程序拦截了您的请求.
- 您的 JDK 安装出现问题，无法找到受信任的证书颁发机构
- 您在覆盖了 JDK 的受信任证书颁发机构列表的应用服务器中运行
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