Building mass email software

[z3r0aCc3Ss]

I am working on building mass email software. .NET platform will be used.
Can any one guide me on how to proceed on this? Which specific language?

EDIT: Ok, I have chosen C#.NET for building this. Interface is quite simple. Will post a pic soon. Now, the internal working is needed.
Please, give me a start.

[z3r0aCc3Ss]

[Gogeta70]

You'll need to initiate a connection to an SMTP server and send commands to it. An open SMTP server isn't quite so easy to find nowadays though.

Perhaps you can use yahoo or gmail's servers, though they may have certain safeguards in place.

[dconex]

Keep in touch I watch with interest but why are you developing this and have a history of Beta Testing RATs and don't understand principles involved here??

[bad_brain]

you can use gmail for anonymous mass mailing with a little trickery. I wrote a little Perl script a few weeks ago, nothing special, just the usual connect->send SMTP stuff you can do with most likely pretty any language. the trick is to proxify the connection, did that on Linux with a combination of proxychains and tor....no idea for windows though.

[z3r0aCc3Ss]

Ok, so far, I have reached here.

Code: Select all

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Mail;

namespace mass_email2
{
    public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

        private void btnPass_Click(object sender, EventArgs e)
        {
            try
            {
                if (txtPassword.UseSystemPasswordChar == false)
                {
                    DialogResult passchar = MessageBox.Show("This will hide your password with asterisk sign (*). Continue?", "", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                    if (passchar == DialogResult.Yes)
                    {
                        txtPassword.UseSystemPasswordChar = true;
                        txtPassword.Focus();
                    }
                }
                else if (txtPassword.UseSystemPasswordChar == true)
                {
                    DialogResult passchar = MessageBox.Show("This will show your password. Continue?", "", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                    if (passchar == DialogResult.Yes)
                    {
                        txtPassword.UseSystemPasswordChar = false;
                        txtPassword.Focus();
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void btnSend_Click(object sender, EventArgs e)
        {
            try
            {
                MailMessage mail = new MailMessage(txtFrom.Text, txtTo.Text, txtSubject.Text, txtMessage.Text);
                SmtpClient smtp = new SmtpClient(txtSMTP.Text);
                smtp.Port = 465;
                smtp.Credentials = new System.Net.NetworkCredential(txtUsername.Text, txtPassword.Text);
                smtp.EnableSsl = true;
                smtp.Send(mail);
                MessageBox.Show("Mail sent successfully!", "Successful", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        private void frmMain_Load(object sender, EventArgs e)
        {

        }
    }
}

This is my code. But when I click on send, it says "Failure sending mail". I am using yahoo as of now (port = 465).
Please help me on this and please give some suggestions.

[z3r0aCc3Ss]

Ok, so far its working for me.
Now, the problem is, I want to send anonymous email.
I am getting smtp authentication error.
How to send anonymous email so that the sender won't be able to know who is sending him the mail.