Javamail gmail setup

Here's a step-by-step guide to setting up JavaMail to send emails using Gmail:

Prerequisites:

JavaMail API (jar file) - download from here
Gmail account with 2-Step Verification enabled (recommended)
Java development environment (e.g., Eclipse, IntelliJ IDEA, NetBeans)

Step 1: Add JavaMail API to your project

Download the JavaMail API jar file and add it to your project's classpath.
If you're using Maven, add the following dependency to your pom.xml file:
```
<dependency>
  <groupId>com.sun.mail</groupId>
  <artifactId>javax.mail</artifactId>
  <version>1.6.2</version>
</dependency>
```
Step 2: Create a Gmail account with 2-Step Verification
Create a new Gmail account or use an existing one.
Enable 2-Step Verification to add an extra layer of security.
Note down the App Password (16-character code) generated by Google.

Step 3: Set up JavaMail properties

Create a Properties object to store the JavaMail settings:

Properties props = new Properties();
props.put("mail.store.protocol", "imaps");
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");

Set the mail.smtp.auth property to true to enable authentication.
Set the mail.smtp.starttls.enable property to true to enable TLS encryption.
Set the mail.smtp.host property to smtp.gmail.com and the mail.smtp.port property to 587 for Gmail's SMTP server.

Step 4: Create a Gmail session

Create a Session object using the Properties object:

Session session = Session.getInstance(props, new javax.mail.Authenticator() {
  protected PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication("your-gmail-username", "your-app-password");
  }
});

Replace your-gmail-username with your Gmail username and your-app-password with the App Password generated by Google.

Step 5: Send an email

Create a Message object and set the sender, recipient, subject, and body:

Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("[email protected]"));
message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
message.setSubject("Test email from JavaMail");
message.setText("This is a test email sent using JavaMail.");

Send the email using the Transport object:
```
Transport.send(message);
```
Example code:

Here's the complete example code:

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

public class JavaMailExample {
    public static void main(String[] args) {
        Properties props = new Properties();
        props.put("mail.store.protocol", "imaps");
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "587");

        Session session = Session.getInstance(props, new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("your-gmail-username", "your-app-password");
            }
        });

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
        message.setSubject("Test email from JavaMail");
        message.setText("This is a test email sent using JavaMail.");

        Transport.send(message);
    }
}

Replace your-gmail-username and your-app-password with your actual Gmail credentials.

Mail Knowledge

Javamail gmail setup