使用Javamail连接到Gmail smtp服务器会忽略指定的端口并尝试使用25

I'm trying to use javamail in a groovy script to send out an email via gmail. I've looked many places online and have been unable to get it working thus far. The error I'm getting when running my script is:

我试图在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,到目前为止还没能让它运转起来。我在运行脚本时遇到的错误是:

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?))

It appears to be trying to use port 25 even though I've specified that it should use port 587. Does anyone know what could be causing this problem, I've used telnet to connect to the smtp server on port 587, and thunderbird uses port 587 with STARTTLS security and is able to successfully send mail using the smtp server. This tells me that it is not a blocked port or connectivity issue. Here is the code I'm using to try and send the email:

它似乎尝试使用端口25,即使我已经指定它应该使用端口587.有谁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thunderbird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。这告诉我它不是阻塞端口或连接问题。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)

Any help would be greatly appreciated. Thanks in advance!

任何帮助将不胜感激。提前致谢!

-Bryan

3 个解决方案

#1

In Java you would do something similar to:

在Java中,你会做类似的事情:

Transport transport = session.getTransport("smtps");
transport.connect (smtp_host, smtp_port, smtp_username, smtp_password);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();

Note 'smtpS' protocol. Also socketFactory properties is no longer necessary in modern JVMs but you might need to set 'mail.smtps.auth' and 'mail.smtps.starttls.enable' to 'true' for Gmail. 'mail.smtps.debug' could be helpful too.

注意'smtpS'协议。现代JVM中不再需要socketFactory属性,但您可能需要为Gmail设置“mail.smtps.auth”和“mail.smtps.starttls.enable”为“true”。 'mail.smtps.debug'也可能有所帮助。

#2

For anyone looking for a full solution, I got this working with the following code based on maximdim's answer:

对于任何寻找完整解决方案的人,我根据maximdim的答案使用以下代码:

import javax.mail.*
import javax.mail.internet.*

private class SMTPAuthenticator extends Authenticator
{
    public PasswordAuthentication getPasswordAuthentication()
    {
        return new PasswordAuthentication('email@gmail.com', 'test1234');
    }
}

def  d_email = "email@gmail.com",
        d_uname = "email",
        d_password = "password",
        d_host = "smtp.gmail.com",
        d_port  = "465", //465,587
        m_to = "testepscript@gmail.com",
        m_subject = "Testing",
        m_text = "Hey, this is the testing email."

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 transport = session.getTransport("smtps");
transport.connect(d_host, 465, d_uname, d_password);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();

#3

Maybe useful for anyone else running into this issue: When setting the port on the properties:

对于遇到此问题的其他人可能有用:在属性上设置端口时:

props.put("mail.smtp.port", smtpPort);

..make sure to use a string object. Using a numeric (ie Long) object will cause this statement to seemingly have no effect.

..确保使用字符串对象。使用数字(即Long)对象将导致此语句看似无效。

#1