利用Javamail接收QQ邮箱和Gmail邮箱(转)

求大神解答

Java代码：

public class SendMailController {

//@Autowired
private JavaMailSenderImpl mailSender;

@RequestMapping(value ="/sendMail", method = RequestMethod.GET)
public void sendMail(HttpServletRequest request) throws MessagingException {
mailSender = new JavaMailSenderImpl();
mailSender.setHost("smtp.qq.com");  //设置邮件服务器
mailSender.setUsername("XXXX@qq.com");
mailSender.setPassword("**********");

MimeMessage msg = mailSender.createMimeMessage();
MimeMessageHelper msgHelper = new MimeMessageHelper(msg, true, "utf-8");

msgHelper.setTo("YYYYYYYYY@qq.com");
msgHelper.setFrom("XXXXXXX@qq.com");
msgHelper.setSubject("测试发送带附件的邮件");
msgHelper.setText("测试邮件");

FileSystemResource file = new FileSystemResource(new File("D:/test.png"));
msgHelper.addAttachment("test.png", file); //添加附件

Properties prop = new Properties();
prop.put("mail.smtp.auth", "true");
prop.put("mail.smtp.timeout", "25000");
mailSender.setJavaMailProperties(prop);

mailSender.send(msg);

System.out.println("邮件发送成功！");
}
}

错误：
type Exception report

message Request processing failed; nested exception is org.springframework.mail.MailSendException: Mail server connection failed; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.mail.MailSendException: Mail server connection failed; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect. Failed messages: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect; message exceptions (1) are:
Failed message 1: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: smtp.qq.com, 25; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:948)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
http://ask.csdn.net/questions/180211
java默认会优先使用ipv6，但是你检查一下你的电脑，是不是ipv6那里没有获得ip？只有ipv4那里是有的。

2种办法：
1.运行你的程序的时候，跟上-Djava.net.preferIPv4Stack=true
2.在你电脑上禁用ipv6，就是在网络连接状态-属性里去掉勾选。

Java Mail接收邮件连接超时异常

通过命令行telnet可以成功实现邮件的接收，但JavaMaik总是报连接超时的异常，代码如下：

@Controller
public class ReceiveMailController {

@RequestMapping(value ="/receiveMail", method = RequestMethod.GET)
public void receiveMail(HttpServletRequest request) throws MessagingException, IOException {
String host = "pop3.sina.com";
String port = "110";
String userName = "******@sina.com";
String password = "******";

Properties p = System.getProperties();
p.put("mail.store.protocol", "pop3");
p.put("mail.pop3.host", host);
p.put("mail.pop3.port", port);
p.put("mail.pop3.auth", "true");//需要邮件服务器认证

MailAuthenticator auth = new MailAuthenticator(userName, password);
Session session = Session.getDefaultInstance(p, auth);

try{
Store store = session.getStore("pop3");
store.connect(host, userName, password);

Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_ONLY);

Message msg[] = folder.getMessages();

//Integer msgCount = msg.length;
for(int i = 0, msgCount = msg.length; i < msgCount; i++){
System.out.println("第"+i+"封邮件主题："+msg[i].getSubject());
}

folder.close(true);
store.close();

System.out.println("Email received successfully!");
}catch(MessagingException e){
e.printStackTrace();
}
}
}

异常：
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: pop3.sina.com, 110; timeout -1;
nested exception is:
java.net.ConnectException: Connection timed out: connect
at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:211)
at javax.mail.Service.connect(Service.java:364)
at javax.mail.Service.connect(Service.java:245)
http://ask.csdn.net/questions/181815

package com.mail;

import com.sun.mail.imap.IMAPMessage;
import org.junit.Test;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeUtility;
import java.io.*;
import java.security.Security;
import java.util.Enumeration;
import java.util.Properties;

public class EmailClient {

private static final String IMAP = "imap";

@Test
public void testReceive() throws Exception {
receiveQQEmail(System.getProperty("email"), System.getProperty("password"));
}

public void receiveQQEmail(String username, String password) throws Exception {
String host = "imap.qq.com";
String port = "143";

Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

Properties props = System.getProperties();
props.setProperty("mail.imap.socketFactory.class", SSL_FACTORY);
//  props.setProperty("mail.imap.socketFactory.fallback", "false");
//     props.setProperty("mail.imap.port", port);
props.setProperty("mail.imap.socketFactory.port", port);

props.setProperty("mail.store.protocol", "imap");
props.setProperty("mail.imap.host", host);
props.setProperty("mail.imap.port", port);
props.setProperty("mail.imap.auth.login.disable", "true");
Session session = Session.getDefaultInstance(props, null);
session.setDebug(false);
Store store = session.getStore(IMAP);
store.connect(host, username, password);
Folder inbox = null;
try {

inbox = store.getFolder("Inbox");
inbox.open(Folder.READ_ONLY);
FetchProfile profile = new FetchProfile();
profile.add(FetchProfile.Item.ENVELOPE);
Message[] messages = inbox.getMessages();
inbox.fetch(messages, profile);
System.out.println("收件箱的邮件数：" + messages.length);

IMAPMessage msg;
for (Message message : messages) {
msg = (IMAPMessage) message;
String from = decodeText(msg.getFrom()[0].toString());
InternetAddress ia = new InternetAddress(from);
System.out.println("FROM:" + ia.getPersonal() + '(' + ia.getAddress() + ')');
System.out.println("TITLE:" + msg.getSubject());
System.out.println("SIZE:" + msg.getSize());
System.out.println("DATE:" + msg.getSentDate());
Enumeration headers = msg.getAllHeaders();
System.out.println("----------------------allHeaders-----------------------------");
while (headers.hasMoreElements()) {
Header header = (Header) headers.nextElement();
System.out.println(header.getName() + " ======= " + header.getValue());
}
parseMultipart((Multipart) msg.getContent());
}

} finally {
try {
if (inbox != null) {
inbox.close(false);
}
} catch (Exception ignored) {
}
try {
store.close();
} catch (Exception ignored) {
}
}
}

protected String decodeText(String text) throws UnsupportedEncodingException {
if (text == null)
return null;
if (text.startsWith("=?GB") || text.startsWith("=?gb"))
text = MimeUtility.decodeText(text);
else
text = new String(text.getBytes("ISO8859_1"));
return text;
}

/**
* 对复杂邮件的解析
*
* @param multipart
* @throws MessagingException
* @throws IOException
*/
public static void parseMultipart(Multipart multipart) throws MessagingException, IOException {
int count = multipart.getCount();
System.out.println("couont =  " + count);
for (int idx = 0; idx < count; idx++) {
BodyPart bodyPart = multipart.getBodyPart(idx);
System.out.println(bodyPart.getContentType());
if (bodyPart.isMimeType("text/plain")) {
System.out.println("plain................." + bodyPart.getContent());
} else if (bodyPart.isMimeType("text/html")) {
System.out.println("html..................." + bodyPart.getContent());
} else if (bodyPart.isMimeType("multipart/*")) {
Multipart mpart = (Multipart) bodyPart.getContent();
parseMultipart(mpart);

} else if (bodyPart.isMimeType("application/octet-stream")) {
String disposition = bodyPart.getDisposition();
System.out.println(disposition);
if (disposition.equalsIgnoreCase(BodyPart.ATTACHMENT)) {
String fileName = bodyPart.getFileName();
InputStream is = bodyPart.getInputStream();
copy(is, new FileOutputStream("D:\\" + fileName));
}
}
}
}

/**
* 文件拷贝，在用户进行附件下载的时候，可以把附件的InputStream传给用户进行下载
*
* @param is
* @param os
* @throws IOException
*/
public static void copy(InputStream is, OutputStream os) throws IOException {
byte[] bytes = new byte[1024];
int len;
while ((len = is.read(bytes)) != -1) {
os.write(bytes, 0, len);
}
if (os != null)
os.close();
is.close();
}
}

http://blog.csdn.net/haigenwong/article/details/7610839