Java实现Eamil发送

import java.util.Date;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class SendEmailUtil {
    private static Log log = LogFactory.getLog(SendEmailUtil.class);
    
    public static final String fromMailAddress = "from_test@163.com";
    public static final String mailName = "from_test";
    public static final String mailPassword = "用户密码";
    public static final String mailServer = "smtp.163.com";
    public static final String toMailAddress = "to_test@163.com";
    public static boolean sendEmail(String emailfrom, String emailTo,
            String title, String content) {
        boolean ret = false;
        try {
            log.info("----------------------------start----------------------");
            log.info("emailfrom:" + emailfrom);
            log.info("emailTo:" + emailTo);
            log.info("title:" + title);
            log.info("content:" + content);
            // 建立邮件会话
            Properties props = new Properties(); // 用来在一个文件中存储键-值对的，其中键和值是用等号分隔的，
            // 存