Java开发邮箱发送系统
public class Gmail
{

/**
* @param args
* @throws MessagingException
* @throws AddressException
*/
public static void main(String[] args) throws AddressException, MessagingException
{
String host = "smtp.yeah.net";
String senduser = "uesrName@yeah.net";
String username = "username";
String password = "password";

Properties prop = new Properties();
prop.setProperty("mail.smtp.host", host);
prop.setProperty("mail.transport.protocol", "smtp");
prop.setProperty("mail.smtp.auth", "true");

Session session = Session.getDefaultInstance(prop);
session.setDebug(true);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(senduser));
message.setRecipient(Message.RecipientType.TO, new InternetAddress("user@sina.cn"));
message.setSubject("标题");

MimeMultipart mu = new MimeMultipart();
MimeBodyPart text = new MimeBodyPart(); // 主体部分
text.setContent("发送的内容", "text/html;charset=utf-8"); // 内容
mu.addBodyPart(text);
mu.setSubType("mixed");
message.setContent(mu); // 收件内容
message.saveChanges();

Transport ts = session.getTransport();
ts.connect(username, password);
ts.sendMessage(message, message.getAllRecipients());
ts.close();

}

}