JavaMail Receive Email, POP3 stands for post office protocol 3 is utilized to recieve an emails from server to the client machine. The store class and folder class are used with MineMessage in collaboration and transport, session is required to receive the email. Let’s see steps of receiving email using JavaMail API first. Here the POP server is used to provide POP3 store object to receive the email.

Steps to receive the emails:
For receiving the email the process involves session object, POP3 store object, folder object. First creating session object and through it access the email over POP3 server.

Let us see the example how to receive the email using javaMail API

import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
public class receivemail {
   public static void check(String host, String storeType, String user,
      String password) 
   {
      try {
      //create properties field
      Properties properties = new Properties();
      properties.put("mail.pop3.host", host);
      properties.put("mail.pop3.port", "995");
      properties.put("mail.pop3.starttls.enable", "true");
      Session emailSession = Session.getDefaultInstance(properties);
      //create the POP3 store object and connect with the pop server
      Store store = emailSession.getStore("pop3s");
      store.connect(host, user, password);
      //create the folder object and open it
      Folder emailFolder = store.getFolder("INBOX");
      emailFolder.open(Folder.READ_ONLY);
      // retrieve the messages from the folder in an array and print it
      Message[] messages = emailFolder.getMessages();
      System.out.println("messages.length---" + messages.length);
      for (int i = 0, n = messages.length; i < n; i++) {
         Message message = messages[i];
         System.out.println("---------------------------------");
         System.out.println("Email Number " + (i + 1));
         System.out.println("Subject: " + message.getSubject());
         System.out.println("From: " + message.getFrom()[0]);
         System.out.println("Text: " + message.getContent().toString());

      }
      //close the store and folder objects
      emailFolder.close(false);
      store.close();

      } catch (NoSuchProviderException e) {
         e.printStackTrace();
      } catch (MessagingException e) {
         e.printStackTrace();
      } catch (Exception e) {
         e.printStackTrace();
      }
   }
   public static void main(String[] args) {
      String host = "pop.gmail.com";// change accordingly
      String mailStoreType = "pop3";
      String username = "9saireddy@gmail.com";// change accordingly
      String password = "splessons";// change accordingly

      check(host, mailStoreType, username, password);
   }

}

Output:

• JavaMail Receive Email – The store class and folder class are used with MineMessage in collaboration and transport, session is required to receive the email.
• JavaMail Receive Email – For receiving the email the process involves session object, POP3 store object, folder object.
• JavaMail Receive Email – Close the store and folder objects.