Can not send mail to other mail server

[Paul Okeke]

public static void main(String[] args) {
    try {
		Properties props = new Properties();
		props.put("mail.host", "pauldiconline.com");
		//props.put("mail.host", "yahoo.com");
		//props.put("mail.host", "gmail.com");

		Session session = Session.getInstance(props, null);
		Message msg = new MimeMessage(session);

		Address from = new InternetAddress("[e-mail]", "Mr. sender");
		Address to = new InternetAddress("[e-mail]");
		//Address to = new InternetAddress("[e-mail]");
		//Address to = new InternetAddress("[e-mail]");

		msg.setContent("Test message to test the send ability", "text/plain");
		msg.setFrom(from);
		msg.setRecipient(Message.RecipientType.TO, to);
		msg.setSubject("Testing Msg");

		System.out.println("Message was sent Successfuly\nNOTE:\tThis does not mean that the Message has been delivered");
	}catch(Exception e){
		e.printStackTrace();
    }

I use the code above to send mail with my local machine but the problem comes when I Uncomment path of the commented lines in other to send mail to the my yahoo and gmail account respectively:

My attempt to yahoo server gives:


javax.mail.MessagingException: Could not connect to SMTP host: yahoo.com, port:25, response: 421;
.....
.....

While my attempt to gmail server gives:

javax.mail.MessagingException: Could not connect to SMTP host: gmail.com, port:25;
.....
.....

Please let somebody help me check if there is something that am not getting right?
I use Apache Jamas Mail Server,
Thank for your help

[Rob Spoor]

http://answers.yahoo.com/question/index?qid=20090318021519AALoBCr
http://mail.google.com/support/bin/answer.py?hl=en&answer=13287

In other words, you cannot use "yahoo.com" or "gmail.com" - you must use their sub domains that are specifically set up for SMTP.

[Paul Okeke]

Actually, I don,t mean configuring my GMail non Yahoo account.

This is my situation,

I have Apache James Mail Server installed on my Local Machine. I also have internet connection which I use to try my code for communication between my local mail server and remote servers like GMail and Yahoo.

So far, things works fine on my local server but I issues arises when I tried access to a remote server like GMail/Yahoo with the code in my previous post and got


Now, I observed that I don't need uncomment either lines 5 or 6 in order to send mail to remote server.
Sending mail with either line 13 or 14, the message sends successfully with out any error.
BUT, unfortunately the message never get delivered to the Yahoo/Gmail Account.

Please Your Help will be high apreciated. I have researched alot for a solution without success.