我正在尝试从我的 java 发送电子邮件,但我无法连接到我的主机。 这是我的代码:
public class sendEmail implements Runnable{
@Override
public void run(){
try{
final String username = "user", password = "pass", from = "from@mail.com", to = "to@mail.com";
Properties props = new Properties();
props.setProperty("mail.smtp.user", username);
props.setProperty("mail.smtp.host", "mail.host.com");
props.setProperty("mail.smtp.ssl.enable", "true");
props.setProperty("mail.smtp.port", "465");
props.setProperty("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.debug", "true");
props.setProperty("mail.smtp.auth", "true");
props.setProperty("mail.smtp.socketFactory.port", "465");
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.setProperty("mail.smtp.socketFactory.fallback", "false");
Authenticator auth = new SMTPAuthenticator();
Session session = Session.getInstance(props, auth);
session.setDebug(true);
Message msg = new MimeMessage(session);
try{
msg.setSubject("Test SMTP");
msg.setFrom(new InternetAddress(from));
msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
Transport transport = session.getTransport("smtp");
transport.connect("mail.itbuntuksemua.com", username, password);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();
System.out.println("Done");
}catch(MessagingException | NumberFormatException | HeadlessException ex){
ex.printStackTrace();
}
}catch(UnknownHostException | NumberFormatException ex){
ex.printStackTrace();
}
}
}
这里是我的 SMTPAuthenticator()
代码:
private class SMTPAuthenticator extends javax.mail.Authenticator {
@Override
public PasswordAuthentication getPasswordAuthentication() {
String username = "user";
String password = "pass";
return new PasswordAuthentication(username, password);
}
}
再一次,我报告错误:
DEBUG: setDebug: JavaMail version 1.4.7 DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle] DEBUG SMTP: useEhlo true, useAuth true DEBUG SMTP: trying to connect to host "mail.host.com", port 465, isSSL true javax.mail.MessagingException: Could not connect to SMTP host: mail.host.com, port: 465; 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.openServer(SMTPTransport.java:1961) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654) at javax.mail.Service.connect(Service.java:295) at javax.mail.Service.connect(Service.java:176) at scam.ccChecker$sendEmail.run(ccChecker.java:186) at java.lang.Thread.run(Thread.java:745) 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:1937) 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:1478) at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:212) at sun.security.ssl.Handshaker.processLoop(Handshaker.java:957) at sun.security.ssl.Handshaker.process_record(Handshaker.java:892) at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1050) at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1363) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1391) at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1375) at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549) at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:354) at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:211) at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927) ... 5 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:387) 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: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:1460) ... 16 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:145) at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131) at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280) at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382) ... 22 more
有人可以帮助我吗? :(
最佳答案
您可能想尝试下载证书,使用 key 工具安装它,然后将它们设置为系统变量。方法如下:
- 在您的 firefox 浏览器中转到 URL,单击 HTTPS 证书链(URL 地址旁边)。单击
“更多信息”>“安全”>“显示证书”>“详细信息”>“导出..”
。选择名称并选择文件类型example.der
。现在你有了带有 keystore 的文件,你必须将它添加到你的 JVM - 找到文件
$JAVA_HOME/jre/lib/security/cacerts
使用以下命令将
example.der
文件导入到cacerts
文件中:sudo keytool -import -alias example -keystore $JAVA_HOME/jre/lib/security/cacerts -file example.der
默认的 keystore 密码是“
changeit
”您可以查看使用此命令所做的显示证书指纹的更改。
keytool -list -keystore cacerts
如果这不能解决问题,请尝试将这些 java 选项添加为参数:
-Djavax.net.ssl.trustStore="$JAVA_HOME/jre/lib/security/cacerts" -Djavax.net.ssl.trustStorePassword="changeit"
或者您可以将它们作为系统变量放入您的 java 代码中:
System.setProperty("javax.net.ssl.trustStore","/usr/lib/jvm/java-1.7.0-openjdk-amd64/jre/lib/security/cacerts"); System.setProperty("javax.net.ssl.trustStorePassword","changeit");
可在此处找到更多说明:https://stackoverflow.com/a/36427118/1696153
关于Javamail - 无法连接到 SMTP 主机,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35007279/