我正在尝试在groovy脚本中使用javamail通过gmail发送电子邮件。我在网上看了很多地方，到目前为止还无法正常工作。运行脚本时出现的错误是：

DEBUG SMTP: useEhlo true, useAuth false

DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 25, isSSL false

Caught: javax.mail.SendFailedException: Send failure (javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25 (javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?))

即使我已指定应使用端口587，它似乎仍在尝试使用端口25。是否有人知道可能导致此问题的原因，我已经使用telnet连接到端口587上的smtp服务器，并且雷鸟使用端口587具有STARTTLS安全性，并且能够使用smtp服务器成功发送邮件。这告诉我这不是端口或连接问题。这是我用来尝试发送电子邮件的代码：

import javax.mail.*

import javax.mail.internet.*

private class SMTPAuthenticator extends Authenticator

{

public PasswordAuthentication getPasswordAuthentication()

{

return new PasswordAuthentication('email@gmail.com', 'password');

}

}

def  d_email = "email@gmail.com",

d_password = "password",

d_host = "smtp.gmail.com",

d_port  = "587", //465,587

m_to = "email@gmail.com",

m_subject = "Testing",

m_text = "This is a test."

def props = new Properties()

props.put("mail.smtp.user", d_email)

props.put("mail.smtp.host", d_host)

props.put("mail.smtp.port", d_port)

props.put("mail.smtp.starttls.enable","true")

props.put("mail.smtp.debug", "true");

props.put("mail.smtp.auth", "true")

props.put("mail.smtp.socketFactory.port", d_port)

props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory")

props.put("mail.smtp.socketFactory.fallback", "false")

def auth = new SMTPAuthenticator()

def session = Session.getInstance(props, auth)

session.setDebug(true);

def msg = new MimeMessage(session)

msg.setText(m_text)

msg.setSubject(m_subject)

msg.setFrom(new InternetAddress(d_email))

msg.addRecipient(Message.RecipientType.TO, new InternetAddress(m_to))

Transport.send(msg)

任何帮助将不胜感激。提前致谢！