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‎Captured Images/Capture_MassMailer_1.PNG‎

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‎Captured Images/Capture_MassMailer_2.PNG‎

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‎Captured Images/Capture_MassMailer_3.PNG‎

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‎src/raynal/mass_mailer/MassMailer_FakeSmtp.java‎

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/*
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* A Mass Mailer Java Application using Jakarta Mail API.
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* The purpose of this program is to enable the user to send out bulk emails.
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*
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* Download the Jakarta Mail and the Jakarta Activation JAR Files and configure in your repository from:
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* https://eclipse-ee4j.github.io/mail/#Download_Jakarta_Mail_Release
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* https://mvnrepository.com/artifact/com.sun.activation/jakarta.activation/2.0.1
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*
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*
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* The recipients.txt found in src\resources\ folder is where the recipient emails are stored (separated by a ',(comma)').
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* The user can manually add new recipients in the recipient.txt file from within the program too.
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*
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* The content.txt found in src\resources\ folder is where the text written in the email is stored.
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* The user can override the text from within the program.
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*
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* The user is required to add a Subject for the Email(s).
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*
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* The user can choose if he wants to add CC, BCC or Attachments to his email(s). This is Optional.
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*
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* The user then needs to enter his Email ID, from which he wishes to send the mail(s).
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*
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* Once the user email is entered, the user has a choice to send each mail individually or to send 1 mail to all of the recipients.
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* If the user chooses the 1 mail(all) option, he can futher choose if he wants to hide the recipient emails while sending
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* (this is done by adding all emails to BCC which in turn hides the emails from the end user - the reciever).
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*
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*
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* This Program is set up for the Fake SMTP Server, which can be downloaded at:
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* http://nilhcem.com/FakeSMTP/download.html
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*
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* Once the Fake SMTP Server is downloaded, start the server at 8080 Port,
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* if you want to use a different port go to src\resouces\fake_smtp.properties
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* and change the 'mail.smtp.port' to any port of your choice.
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*
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*
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* @author - 04xRaynal
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*/
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package raynal.mass_mailer;
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import java.io.BufferedInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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import java.util.Properties;
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import java.util.Scanner;
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import javax.swing.JFileChooser;
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import javax.swing.UIManager;
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import javax.swing.UnsupportedLookAndFeelException;
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import jakarta.mail.Message;
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import jakarta.mail.MessagingException;
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import jakarta.mail.Multipart;
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import jakarta.mail.Session;
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import jakarta.mail.Transport;
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import jakarta.mail.internet.AddressException;
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import jakarta.mail.internet.InternetAddress;
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import jakarta.mail.internet.MimeBodyPart;
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import jakarta.mail.internet.MimeMessage;
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import jakarta.mail.internet.MimeMultipart;
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public class MassMailer_FakeSmtp {
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Properties properties;
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Session session;
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Message message;
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private ArrayList<File> files;
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public MassMailer_FakeSmtp() {
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try {
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properties = System.getProperties();
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FileInputStream fis = new FileInputStream("src\\resources\\fake_smtp.properties");
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properties.load(fis);
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fis.close();
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session = Session.getDefaultInstance(properties);
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files = new ArrayList<>(); //List to store the Attachment Files if added
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List<String> recipientEmails = new ArrayList<>(); //List to store the recipient emails
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List<String> ccEmailsList = new ArrayList<>(); //List to store the CC Emails if added
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List<String> bccEmailsList = new ArrayList<>(); //List to store the BCC Emails if added
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try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); }
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catch (ClassNotFoundException e) {}
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catch (InstantiationException e) {}
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catch (IllegalAccessException e) {}
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catch (UnsupportedLookAndFeelException e) {} //Refines the look of the ui (For the JFileChooser)
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final JFileChooser fileChooser = new javax.swing.JFileChooser();
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fileChooser.setCurrentDirectory(new File("."));
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int sentCount = 0;
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System.out.println("Email Recipients are taken from recipients.txt file found in the src\\resources\\ folder.\n"
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+ "You can also manually add recipient emails in the recipients.txt file.");
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System.out.println("Do you want to manually enter recipient emails?\n"
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+ "Press Y for Yes or N for No");
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Scanner sc = new Scanner(System.in);
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String manualEnter = sc.nextLine();
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switch(manualEnter) {
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case ("Y"):
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case ("y"):
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String manualInput = null;
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do {
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System.out.println("Enter a recipient email, enter 'STOP' to stop:");
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manualInput = sc.nextLine();
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recipientEmails.add(manualInput);
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} while(!manualInput.toLowerCase().equals("stop"));
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recipientEmails.remove(recipientEmails.size() - 1); //"stop" is removed from the list
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FileWriter fw = new FileWriter(new File("src\\resources\\recipients.txt"), true); //true denotes [append - true]
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for(String email: recipientEmails) {
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fw.write(email);
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fw.write(",");
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}
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fw.flush();
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fw.close();
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break;
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case ("N"):
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case ("n"):
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StringBuilder sbEmail = new StringBuilder();
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BufferedInputStream bis = new BufferedInputStream(new FileInputStream(new File("src\\resources\\recipients.txt")));
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int readByte;
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while((readByte = bis.read()) != -1) {
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sbEmail.append((char)readByte);
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}
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bis.close();
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String[] emailArray = sbEmail.toString().split(","); //Values from the StringBuilder are stored in a String, with commas removed
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for(String email: emailArray)
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recipientEmails.add(email);
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break;
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default: System.out.println("Invalid Input! Program terminated.");
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}
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System.out.println("Enter a Subject for your Mail:");
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String subject = sc.nextLine();
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System.out.println("Press 'C' to use content.txt or 'X' to input text");
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String contentInput = sc.nextLine();
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StringBuilder contentSB = new StringBuilder();
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switch(contentInput) {
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case ("C"):
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case ("c"):
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BufferedInputStream bis = new BufferedInputStream(new FileInputStream(new File("src\\resources\\content.txt")));
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int contentRead;
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while((contentRead = bis.read()) != -1) {
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contentSB.append((char)contentRead);
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}
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break;
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case ("X"):
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case ("x"):
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default:
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String inputText = null;
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do {
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System.out.println("Enter Line of Text, input 'STOP' to stop:");
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inputText = sc.nextLine();
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contentSB.append(inputText + "\n");
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} while(! (inputText.toLowerCase().equals("stop")));
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contentSB.delete(contentSB.length() - 5, contentSB.length()); //deleting (length - 5) from the end to remove "stop\n"
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}
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System.out.println("Do you want to add CC, BCC or add File Attachments?\n"
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+ "Input 'Y' for Yes or 'N' for No");
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String attachmentInput = sc.nextLine();
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if(attachmentInput.toLowerCase().equals("y")) {
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System.out.println("Do you want to add emails in CC ?\n"
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+ "Press 'Y for Yes or 'N' for No.");
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String ccInput = sc.nextLine();
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String ccInputEmail = "";
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if(ccInput.equals("Y") || ccInput.equals("y")) {
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do {
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System.out.println("Input an email for CC, Enter STOP to stop");
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ccInputEmail = sc.nextLine();
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ccEmailsList.add(ccInputEmail);
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}while(! ccInputEmail.toLowerCase().equals("stop"));
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ccEmailsList.remove(ccEmailsList.size() - 1); //removing "stop" from the list
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}
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System.out.println("Do you want to add emails in BCC ?\n"
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+ "Press 'Y for Yes or 'N' for No.");
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String bccInput = sc.nextLine();
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String bccInputEmail = "";
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if(bccInput.equals("Y") || bccInput.equals("y")) {
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do {
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System.out.println("Input an email for BCC, Enter STOP to stop");
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bccInputEmail = sc.nextLine();
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bccEmailsList.add(bccInputEmail);
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}while(! bccInputEmail.toLowerCase().equals("stop"));
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bccEmailsList.remove(bccEmailsList.size() - 1); //removing "stop" from the list
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}
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String attachInput;
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do {
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System.out.println("Do you want to add File Attachments?\n"
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+ "Press 'Y for Yes or 'N' for No.");
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attachInput = sc.nextLine();
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if(attachInput.equals("Y") || attachInput.equals("y")) {
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int fcReturnValue = fileChooser.showOpenDialog(null);
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if(fcReturnValue == JFileChooser.APPROVE_OPTION) {
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files.add(fileChooser.getSelectedFile());
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}
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}
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} while(! attachInput.toLowerCase().equals("n"));
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}
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System.out.println("Enter your email address:");
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String from = sc.nextLine();
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message = new MimeMessage(session);
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try {
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message.setFrom(new InternetAddress(from));
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message.setSubject(subject);
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message.setSentDate(new Date());
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//If CC Emails were added above, adding them in mail
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if(ccEmailsList.size() > 0) {
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StringBuilder sbCcEmails = new StringBuilder();
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for(String ccEmail: ccEmailsList)
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sbCcEmails.append(ccEmail + ",");
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message.addRecipients(Message.RecipientType.CC, InternetAddress.parse(sbCcEmails.toString()));
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}
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//If BCC Emails were added above, adding them in mail
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if(bccEmailsList.size() > 0) {
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StringBuilder sbBccEmails = new StringBuilder();
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for(String bccEmail: bccEmailsList)
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sbBccEmails.append(bccEmail + ",");
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message.addRecipients(Message.RecipientType.BCC, InternetAddress.parse(sbBccEmails.toString()));
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}
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MimeBodyPart messageBodyPart = new MimeBodyPart();
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Multipart multipart = new MimeMultipart();
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messageBodyPart.setContent(contentSB.toString(),"text/plain");
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multipart.addBodyPart(messageBodyPart);
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//If Attachments were added above, adding them in mail
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if(files.size() > 0) {
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for(File file: files) {
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MimeBodyPart messageBodyPart_file = new MimeBodyPart();
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messageBodyPart_file.attachFile(file);
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multipart.addBodyPart(messageBodyPart_file);
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}
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}
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String sendPref;
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do {
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System.out.println("Enter 'IND' to mail all recipients individually.\n"
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+ "Or enter 'ALL' to include All recipients in a single mail.");
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sendPref = sc.nextLine();
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} while(! (sendPref.toLowerCase().equals("all") || sendPref.toLowerCase().equals("ind")));
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long startTime = System.currentTimeMillis();
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switch(sendPref.toLowerCase()) {
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case ("ind"):
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//Sending emails individually
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for(String recipientEmail: recipientEmails) {
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message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipientEmail));
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message.setContent(multipart);
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Transport.send(message);
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sentCount++;
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}
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break;
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case ("all"):
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StringBuilder sbEmailsList = new StringBuilder();
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for(String recipientEmail: recipientEmails)
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sbEmailsList.append(recipientEmail + ",");
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System.out.println("Do you want to hide the recipients Email Address?\n"
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+ "Enter 'Y' for YES or 'N' for NO");
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String allPref = sc.nextLine();
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if(allPref.toLowerCase().equals("y")) {
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message.addRecipients(Message.RecipientType.BCC, InternetAddress.parse(sbEmailsList.toString())); //with BCC recipients name gets hidden
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}
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else {
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message.addRecipients(Message.RecipientType.TO, InternetAddress.parse(sbEmailsList.toString()));
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}
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message.setContent(multipart);
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Transport.send(message);
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sentCount++;
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break;
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default: System.out.println("Invalid Input! Enter Again.");
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}
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long endTime = System.currentTimeMillis();
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System.out.println("Total Time taken to send mails: " + (endTime-startTime)/1000 + "seconds");
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}
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catch(AddressException ex) {
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ex.printStackTrace();
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}
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catch(MessagingException ex) {
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ex.printStackTrace();
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}
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finally {
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sc.close();
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}
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System.out.println("Amount of E-mails sent: " + sentCount);
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}
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catch (FileNotFoundException ex) {
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ex.printStackTrace();
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}
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catch (IOException ex) {
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ex.printStackTrace();
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}
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}
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public static void main(String[] args) {
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new MassMailer_FakeSmtp();
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}
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}

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