jbpm4 发送smtp验证的邮件

jbpm4.4中使用mail组件发邮件时如果邮件服务器要求smtp 验证用户 经过反复测试没能成功，通过观察javamail发送到需要smtp验证的服务器的代码，对比jbpm中的实现类，发现jbpm好像那个类没有实现权限验证的连接。
下面代码是经过修改后的，实现了smtp验证服务器发邮件。测试成功！

package org.jbpm.pvm.internal.email.impl;

import java.util.Collection;
import java.util.List;

import javax.mail.Address;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.Message.RecipientType;
import javax.mail.internet.InternetAddress;

import org.jbpm.api.JbpmException;
import org.jbpm.pvm.internal.email.spi.MailSession;

public class MailSessionImpl implements MailSession {

	private List<MailServer>	mailServers;

	public void send(Collection<Message> emails) {
		// Emails need to have the sessions populated.
		for (Message email : emails) {
			try {
				Address[] to = email.getRecipients(RecipientType.TO);
				Address[] cc = email.getRecipients(RecipientType.CC);
				Address[] bcc = email.getRecipients(RecipientType.BCC);

				for (MailServer mailServer : mailServers) {
					// Need to apply filter.
					AddressFilter addressFilter = mailServer.getAddressFilter();
					if (addressFilter != null) {
						// Set the email with the new filtered addresses.
						email.setRecipients(RecipientType.TO, addressFilter.filter(to));
						email.setRecipients(RecipientType.CC, addressFilter.filter(cc));
						email.setRecipients(RecipientType.BCC, addressFilter.filter(bcc));
					}

					// if sender is not present, use local address
					Session mailSession = mailServer.getMailSession();
					if (email.getFrom() == null) {
						email.setFrom(InternetAddress.getLocalAddress(mailSession));
					}

					// If there is someone to send it to, then send it.
					Address[] recipients = email.getAllRecipients();
					if (recipients.length > 0) {
						Transport transport = mailSession.getTransport(recipients[0]);
						try {
							// transport.connect(); //原来smtp的连接服务器代码
							transport.connect("smtp.sina.com", "邮箱账号", "密码");
							transport.sendMessage(email, recipients);
							System.out.println("MailSessionImpl.send()  ok!");
						} finally {
							transport.close();
						}
					}
				}
			} catch (MessagingException e) {
				throw new JbpmException("could not send email: " + email, e);
			}
		}
	}

	public List<MailServer> getMailServers() {
		return mailServers;
	}

	protected void setMailServers(List<MailServer> mailServers) {
		this.mailServers = mailServers;
	}

}

注意 transport.connect("smtp.sina.com", "邮箱账号", "密码");中使用的账号和jbpm.mail.properties

mail.smtp.host=smtp.sina.com.cn
mail.from=[e-mail]
mail.smtp.auth=true