Sending mail in web
applications are very useful tool. In this blog I will discus how to
send e-mail using gmail SMTP.
Pre-requisite
of mail sending programme:-
I presume that you have
good knowledge of running a web application on Java server like
Apache Tomcat or Glassfish etc.
You require following API to
implement sending mail in Java-
-
mail.jar- this file can be downloaded from here.
-
activation.jar- this file can be downloaded from here.
- Or mail api from here.
So, download these and add it
to your project. How to add external Jar file to a project see here.
Create
a form to send mail:-
mail.html
<form name="emailForm"
action="sendmail.jsp" method="post">
<table>
<tr><td><b><font
color="red">To:
</td>
<td><b><b><input
type="text" name="mail" placeholder="Enter
sender mail-id"/><br/>
</td>
</tr>
<tr>
<td>
<b><font
color="red">Subject:
</td>
<td>
<input
type="text" name="sub" placeholder="Enter
Subject Line"><br/>
</td>
</tr>
<tr>
<td>
<b><font
color="red">Message Text:
</td>
<td>
<textarea
rows="12" cols="80" name="mess"></textarea><br/>
</td>
</tr>
<tr>
<td>
<input
type="submit" value="Send" name="btn1">
</td>
<td>
<input
type="reset" value="Reset">
</td>
</tr>
</table>
</form>
Java
Code to send mail:-
sendmail.jsp
Import these packages in your
send mail Java Code
<%@ page
import="java.util.*,javax.mail.*"%>
<%@ page
import="javax.mail.internet.*" %>
<%@ page
import="javax.activation.*" %>
if
(request.getParameter("btn1") != null)
{
//Creating a result for
getting status that messsage is delivered or not!
String result;
// Get recipient's
email-ID, message & subject-line from mail.html page
final String to =
request.getParameter("mail");
final String subject =
request.getParameter("sub");
final String messg =
request.getParameter("mess");
// Sender's email ID and
password needs to be mentioned
final String from =
"sender-mail@gmail.com";
final String pass =
"sendermailpassword";
// Defining the gmail host
String host =
"smtp.gmail.com";
// Creating Properties
object
Properties props = new
Properties();
// Defining properties
props.put("mail.smtp.ssl.enable","true");
props.put("mail.smtp.host",
host);
props.put("mail.transport.protocol",
"smtp");
props.put("mail.smtp.auth",
"true");
props.put("mail.smtp.starttls.enable",
"true");
props.put("mail.user",
from);
props.put("mail.password",
pass);
props.put("mail.port",
"587"); // there are some other ports also available like 465 you can also use.
// Authorized the Session
object.
Session mailSession =
Session.getInstance(props, new javax.mail.Authenticator() {
@Override
protected
PasswordAuthentication getPasswordAuthentication() {
return new
PasswordAuthentication(from, pass);
}
});
try {
// Create a default
MimeMessage object.
MimeMessage message =
new MimeMessage(mailSession);
// Set From: header
field of the header.
message.setFrom(new
InternetAddress(from));
// Set To: header
field of the header.
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(to));
// Set Subject: header
field
message.setSubject(subject);
// Now set the actual
message
message.setText(messg);
// Send message
Transport.send(message);
result = "Your
mail sent successfully....";
out.println(result);
} catch
(MessagingException mex) {
mex.printStackTrace();
result = "Error:
unable to send mail....";
out.println(mex);
out.println(result);}
}
If everything goes fine then
you will be able to successfully send mail.
1. Apart from above you may
also require to set your gmail account to allow less secure app to
use your account. You may check it from here.
2. Some common mistakes can be
find from here.
3. Some other help that may help you.
