Java program to send email with attachments

Note: To run below example u need to add JavaMail jar files in your classpath

Simple java program to send Mail using JavaMail API

The JavaMail API provides a platform-independent and protocol-independent framework to build mail and messaging applications. to know more, click here.

For below program to run, please add mail.jar in your application's classpath. Download mail.jar.

How to send mail using MAILX command in UNIX / LINUX

Simple MAILX command

Below is the syntax to send simple mail using mailx command in UNIX / Linux.
You can use it as command line or used it in your shell script.


$ mailx -s "Mail Subject" test@xyz.com
type body of the mail
...
..
EOT (Ctrl+d)
$

Send attachment using MAILX command

In some cases you may have to send attachment in the mail. Lets see the syntax of sending an attachment using mailx command.

Below is the syntax to attach a file while sending a mail using mailx command in LINUX / UNIX


( cat /root/MailBody.txt
uuencode /root/file_name.txt file_name.txt 
) | mailx -s "Mail Subject" test@xyz.com


Here file_name.txt is the attachment to be attached in the mail
AND MailBody.txt is the text body of the mail.

java : Simple java program to read mails from your gmail account

Connecting GMail using POP3 connection with SSL

POP (Post Office Protocol 3)
This protocol defines a single mailbox for a single user and a standardized way for users to access mailboxes and download messages to their computer.


To run this code u need to download Java Mail API and JavaBeans Activation Framework


/*Here is the complete tested code for ReadGmailAccount.java*/


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

public class ReadGmailAccount
{
public static void main(String[] args)
{
Properties props = System.getProperties();

props.put("mail.pop3.socketFactory.class","javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback","false");
props.setProperty("mail.pop3.port", "995");
props.setProperty("mail.pop3.socketFactory.port", "995");

Session session = Session.getDefaultInstance(props,null);

URLName urln = new URLName("pop3","pop.gmail.com",995,null,"madan712@gmail.com","*******");//password


try
{
Store store = session.getStore(urln);

store.connect();

Folder folder = store.getFolder("INBOX");

folder.open(Folder.READ_ONLY);

Message[] message = folder.getMessages();

for (int i = 0; i < message.length; i++)
{

System.out.println("------------ Message " + (i + 1) + " ------------");

System.out.println("Subject : " + message[i].getSubject());
System.out.println("SentDate : " + message[i].getSentDate());
System.out.println("From : " + message[i].getFrom()[0]);

System.out.print("Message : ");

InputStream stream = message[i].getInputStream();
while (stream.available() != 0)
{
System.out.print((char) stream.read());
}
}

folder.close(true);
store.close();
}
catch (Exception ex)
{
System.out.println("Exception occured"+ex);
ex.printStackTrace();
}
}
}

java : simple program to send mails using Gmail (ie javamail API)

Here is the code to send mail using gmail

Note: to run this code u need to download JavaMail 1.4.2  jar files

/*Here is the complete tested code for Gmail.java */

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

public class Gmail
{
public static void main(String[] args)
{
Properties props = new Properties();
props.put("mail.smtp.user","madan712@gmail.com");
props.put("mail.smtp.host","smtp.gmail.com");
props.put("mail.smtp.port","465");

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

props.put("mail.smtp.socketFactory.port","465");

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

try
{
Session session = Session.getDefaultInstance(props, null);
session.setDebug(true);

MimeMessage msg = new MimeMessage(session);
msg.setSubject("Testing");
msg.setText("Hi !! how are you??");

msg.setFrom(new InternetAddress("madan712@gmail.com"));

msg.addRecipient(Message.RecipientType.TO, new InternetAddress("madan@indiagames.com"));

msg.addRecipient(Message.RecipientType.CC, new InternetAddress("madan_chaudhary@rediffmail.com"));

msg.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com","madan712@gmail.com","********");//password
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();

}
catch (Exception ex)
{
System.out.println("Exception occured");
ex.printStackTrace();
}
}
}




this is common exception every one gets if your server doesn't responds....



Exception in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 25;
nested exception is:
java.net.ConnectException: Connection refused: connect
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1282)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:288)
at javax.mail.Service.connect(Service.java:169)
at javax.mail.Service.connect(Service.java:118)
at SimpleMail.main(SimpleMail.java:23)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
... 5 more