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

问题描述

我在这里和其他地方搜索了几个相关的帖子，但是他们没有一个能解决我的问题。我有一个使用javamail API将电子邮件发送给一组人的程序。它运行良好一次。今天我再次需要，但我不能发送任何电子邮件...我的sendEmail方法如下：
$ b $ pre $ public void sendEmail（String userName，String password，String toAddress，
String subject，String message，String [] attachFiles）
throws AddressException，MessagingException {

//设置SMTP属性
属性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）;

//使用认证器创建一个新的会话
Authenticator auth = new SMTPAuthenticator（userName，password）;
Session session = Session.getInstance（properties，auth）;

//创建新的电子邮件消息
MimeMessage msg = new MimeMessage（session）;

尝试{
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（））;

//创建消息部分
MimeBodyPart messageBodyPart = new MimeBodyPart（）;
messageBodyPart.setContent（message，text / html）;

//创建多部分
Multipart multipart = new MimeMultipart（）;
multipart.addBodyPart（messageBodyPart）;

//添加附件
if（attachFiles！= null&& attachFiles.length> 0）{
for（String filePath：attachFiles）{
addAttachment（multipart，filePath）;
}
}

//将多部分设置为电子邮件的内容
msg.setContent（multipart）;

//发送电子邮件
Transport.send（msg）;






$ b因此，现在试图调用这个方法我得到了以下错误
（我正在使用jdk 1.7.0_21）：



 发送电子邮件失败... 
 
 javax.mail.MessagingException：无法将套接字转换为TLS; 
嵌套异常是：
 javax.net.ssl.SSLHandshakeException：sun.security.validator.ValidatorException：PKIX路径构建失败：sun.security.provider.certpath.SunCertPathBuilderException：无法找到有效的证书路径请求目标
，位于com.sun.mail.smtp.SMTPTransport.startTLS（SMTPTransport.java:1907）
 at com.sun.mail.smtp.SMTPTransport.protocolConnect（SMTPTransport.java:666）$ b $ javax.mail.Service.connect（Service.java:367）$ b在javax.mail.Service.connect（Service.java:226）
在javax.mail.Service.connect（Service .java：175）
在javax.mail.Transport.send0（Transport.java:253）
在javax.mail.Transport.send（Transport.java:124）
在EmailSender。 （CFP_LaWasp_EmailSender.java:220）
引起：javax.net.ssl .SSLHandshakeException：sun.security.validator。 ValidatorException：PKIX路径构建失败：sun.security.provider.certpath.SunCertPathBuilderException：在sun.security.ssl.Alerts.getSSLException（Alerts.java:192）$ b $无法找到所请求目标的有效证书路径
 b在sun.security.ssl.SSLSocketImpl.fatal（SSLSocketImpl.java:1886）
在sun.security.ssl.Handshaker.fatalSE（Handshaker.java:276）
在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.startHand （SSLSocketImpl.java:1339）
 at sun.security.ssl.SSLSocketImpl.startHandshake（SSLSocketImpl.java:1323）
 at com.sun.mail.util.SocketFetcher.configureSSLSocket（SocketFetcher.java： 528）
在com.sun.mail.util.SocketFetcher.startTLS（SocketFetcher.java:465）
在com.sun.mail.smtp.SMTPTransport.startTLS（SMTPTransport.java:1902）
 ... 9 more 
导致：sun.security.validator.ValidatorException：PKIX路径构建失败：sun.security.provider.certpath.SunCertPathBuilderException：无法找到有效的证书路径到所请求的目标
 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.j ava：231）
 at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted（X509TrustManagerImpl.java:126）
 at sun.security.ssl.ClientHandshaker.serverCertificate（ClientHandshaker.java:1323）
 ... 19 more 
导致：sun.security.provider.certpath.SunCertPathBuilderException：在sun.security.provider.certpath.SunCertPathBuilder.engineBuild（SunCertPathBuilder。）无法找到有效的证书路径到所请求的目标
。 
 at java.security.cert.CertPathBuilder.build（CertPathBuilder.java:268）
 at sun.security.validator.PKIXValidator.doBuild（PKIXValidator.java:380）
 ... 25更多
  

我不知道如何解决这个问题，因为它曾经工作之前...另外，我不知道我的Gmail是否与此有关（如果它阻止了此访问...）

感谢任何帮助。

解决方案

关键错误是这样的：

。安全。 provider.certpath.SunCertPathBuilderException：无法找到要求的目标的有效证书路径

请参阅此JavaMail FAQ条目。

由于您连接到Gmail，因此不会发生这种情况。最可能的原因是：

• 防火墙或防病毒程序拦截您的请求。


• 您的JDK安装中存在错误，导致它无法找到可信的证书颁发机构


• 您正在运行在覆盖JDK的可信证书颁发机构列表的应用程序服务器中

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);

}

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

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...)

I appreciate any help.

解决方案

The key error is this:

Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

See this JavaMail FAQ entry.

Since you're connecting to Gmail, this shouldn't happen. The most likely causes are:

• There's a firewall or anti-virus program intercepting your request.
• There's something wrong in your JDK installation preventing it from finding the trusted certificate authorities
• You're running in an application server that has overridden the JDK's list of trusted certificate authorities

这篇关于我的Java程序停止使用我的Gmail帐户发送电子邮件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！