通过 Java Mail API 发送电子邮件时出错？
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Error when sending email via Java Mail API?
提问by Chi?n Nghê
I got following error when trying to send email via Java Mail API? What does this error mean?
尝试通过 Java Mail API 发送电子邮件时出现以下错误？这个错误是什么意思？
javax.mail.MessagingException: Exception reading response;
nested exception is:
java.net.SocketTimeoutException: Read timed out
javax.mail.MessagingException: Exception reading response;
nested exception is:
java.net.SocketTimeoutException: Read timed out
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:2210)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1950)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
Here is my code, i set all parameters (from, to , subjects and attachments)
这是我的代码，我设置了所有参数（从、到、主题和附件）
public static void send(MailUtil mailUtil) throws MessagingException {
MimeMessage message = new MimeMessage(session);
if (props.getProperty(IConstants.DL_MAIL_CONFIGURATION.MAIL_SENDER) != null) {
message.setFrom(new InternetAddress(props.getProperty(IConstants.DL_MAIL_CONFIGURATION.MAIL_SENDER)));
} else {
message.setFrom(new InternetAddress(mailUtil.getFrom()));
}
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(mailUtil.getTo()));
if (mailUtil.getBcc() != null && mailUtil.getBcc().trim().length() > 0) {
message.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(mailUtil.getBcc()));
} else {
message.setRecipients(Message.RecipientType.BCC,InternetAddress.parse(""));
}
message.setSubject(mailUtil.getSubject(), "UTF-8");
// Check for files list and attach them.
if (mailUtil.attachmentFiles != null && mailUtil.attachmentFiles.size() > 0) {
Multipart multipart = new MimeMultipart();
// Set content.
BodyPart messageBodyPart =new MimeBodyPart();
messageBodyPart.setContent(mailUtil.getContent(), "text/plain; charset=utf-8");
multipart.addBodyPart(messageBodyPart);
// Attach files.
for (File file : mailUtil.attachmentFiles) {
messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(file);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(file.getName());
multipart.addBodyPart(messageBodyPart);
}
message.setContent(multipart);
} else {
//message.setContent("<h1>Hello world</h1>", "text/html");
message.setContent(mailUtil.getContent(), "text/html; charset=UTF-8");
}
Transport.send(message);
}
I just think is there any problem with my paramters?
我只是觉得我的参数有问题吗？
Belows is my configuration
下面是我的配置
mail.smtp.port=465
mail.smtp.starttls.enable=true
mail.smtp.auth=true
mail.smtp.socketFactory.port=465
mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactory
mail.smtp.timeout=25000
mail.smtp.host=smtp.gmail.com
mail.username = [email protected]
mail.password = mypassword
mail.sender = [email protected]
mail.receiver = [email protected]
mail.subject = mysubject
I am using google mail server! I dont' think there is problem there!
我正在使用谷歌邮件服务器！我不认为那里有问题！
Belows is session initiation
下面是会话启动
final String userName = props.getProperty(IConstants.DL_MAIL_CONFIGURATION.MAIL_USERNAME);
final String passWord = props.getProperty(IConstants.DL_MAIL_CONFIGURATION.MAIL_PASSWORD);
session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName,
passWord);
}
});
采纳答案by Chi?n Nghê
I believe it absolutely relates to server configuration. When I change the port configuration from 465 to 587, it solves my problem! Anyway, thank you guy for your help!
我相信它绝对与服务器配置有关。当我将端口配置从 465 更改为 587 时，它解决了我的问题！无论如何，谢谢你的帮助！
回答by Typo
I'm not sure why you use a "mail" object to setup the connection properties, instead try this, it should work, I've tested myself:
我不确定你为什么使用“邮件”对象来设置连接属性，而是试试这个，它应该可以工作，我已经测试过自己：
private Properties props;
props = System.getProperties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");
session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
try {
message.setFrom(new InternetAddress("YOUR EMAIL ADDRESS HERE"));
message.addRecipient(Message.RecipientType.TO, new InternetAddress("RECEIVER EMAIL ADDRESS HERE"));
message.setSubject("SUBJECT");
message.setText("THE EMAIL TEXT");
Transport.send(message);
} catch (MessagingException e) {e.printStackTrace();}
}
回答by Bill Shannon
Your code and configuration contain many of these common mistakes. In particular, the use of Session.getDefaultInstance may mean you're not using the configuration you think you're using. If fixing that doesn't solve your problem, post the JavaMail session debug output.
您的代码和配置包含许多这些常见错误。特别是，使用Session.getDefaultInstance 可能意味着您没有使用您认为正在使用的配置。如果修复不能解决您的问题，请发布JavaMail 会话调试输出。
