Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win


Email problem

Posted on 2004-10-28
Medium Priority
Last Modified: 2013-11-24
Hi I've have code that I am using to send and email.

I'm getting the following error when I run it:

Invalid Addresses;
  nested exception is:
        class com.sun.mail.smtp.SMTPAddressFailedException: 550 5.7.1 Unable to relay for [The To email address is here]

email address I'm sending to and from are valid email addresses.
Code is as follows:

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;

public class SendMail
      public void Send( String recipients[ ], String subject, String message , String from) throws MessagingException
          boolean debug = false;
           //Set the host smtp address
           Properties props = new Properties();
           props.put("mail.smtp.host", "[SMTP Server]");
          // create some properties and get the default Session
          Session session = Session.getDefaultInstance(props, null);
          // create a message
          Message msg = new MimeMessage(session);
          // set the from and to address
          InternetAddress addressFrom = new InternetAddress(from);
          InternetAddress[] addressTo = new InternetAddress[recipients.length];
          for (int i = 0; i < recipients.length; i++)
              addressTo[i] = new InternetAddress(recipients[i]);
          msg.setRecipients(Message.RecipientType.TO, addressTo);
          // Optional : You can also set your custom headers in the Email if you Want
          //msg.addHeader("MyHeaderName", "myHeaderValue");
          // Setting the Subject and Content Type
          msg.setContent(message, "text/plain");
      public static void main(String[] args){
            String[] recipents = {"[To Email address]"};
            SendMail sm = new SendMail();
                  sm.Send(recipents, "Testing mail", "Hello there", "[From Email address]");
            catch(MessagingException msgex)      {
Question by:Bourke
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Expert Comment

ID: 12432671

Are u sure your SMTP server is exists and is running and does not require authentication??(mail.smtp.host)

Accepted Solution

TannerMan earned 200 total points
ID: 12432698
The smtp server your trying to send mail out of is tossing the error up "Unable to relay for " .

Ask the administrator of the mail server to configure it to allow relaying for the IP address of your web server.
That should correct your issue, IF I understood it correctly.

Hope it helps

Expert Comment

ID: 12437176
The java code is fine... as mentioned above, the mail server used is rejecting the message due to relaying rules.

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Whether you've completed a degree in computer sciences or you're a self-taught programmer, writing your first lines of code in the real world is always a challenge. Here are some of the most common pitfalls for new programmers.
The SignAloud Glove is capable of translating American Sign Language signs into text and audio.
The viewer will learn how to implement Singleton Design Pattern in Java.
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

604 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question