Solution for Bounced Email

Download: Chilkat .NET Assemblies

C# sample source code showing how to create a bounced mail handler.

        private void button1_Click(object sender, System.EventArgs e)
        {
        // The Chilkat Bounce component is used to classify an email as
        // one of several types of automated replies such as bounced
        // email messages, virus warnings, out-of-office replies, etc.
        // To read email from a POP3 server, the Chilkat Mail component
        // (licensed separately) is used.

        Chilkat.MailMan mailman = new Chilkat.MailMan();
        mailman.UnlockComponent("MailUnlockCode");
        mailman.MailHost = "mail.chilkatsoft.com";
        mailman.PopUsername = "login";
        mailman.PopPassword = "password";

        Chilkat.Bounce bounce = new Chilkat.Bounce();
        bool success = bounce.UnlockComponent("BounceUnlockCode");
        if (!success)
        {
            textBox1.Text = bounce.LastErrorText;
            return;
        }

        // Read email from the POP3 server.
        Chilkat.EmailBundle bundle;
        bundle = mailman.CopyMail();
        if (bundle != null) 
        {
            // Loop over each email...
            Chilkat.Email email;
            int i;
            bool success;
            for (i=0; i<bundle.MessageCount; i++)
            {
                email = bundle.GetEmail(i);

                // See if this is a bounced email.
                // This sets the properties of the Bounce object
                success = bounce.ExamineEmail(email);
                if (!success)
                    listBox1.Items.Add("Failed to classify email");
                else if (bounce.BounceType == 1) 
                    // Hard bounce, log the email address
                    listBox1.Items.Add("Hard Bounce: " + bounce.BounceAddress);
                else if (bounce.BounceType == 2) 
                    // Soft bounce, log the email address
                    listBox1.Items.Add("Soft Bounce: " + bounce.BounceAddress);
                else if (bounce.BounceType == 3) 
                    // General bounce, no email address available.
                    listBox1.Items.Add("General Bounce: No email address");
                else if (bounce.BounceType == 4) 
                    // General bounce, log the email address
                    listBox1.Items.Add("General Bounce: " + bounce.BounceAddress);
                else if (bounce.BounceType == 5) 
                    // Mail blocked, log the email address
                    listBox1.Items.Add("Mail Blocked: " + bounce.BounceAddress);
                else if (bounce.BounceType == 6) 
                    // Auto-reply, log the email address
                    listBox1.Items.Add("Auto-Reply: " + bounce.BounceAddress);
                else if (bounce.BounceType == 7) 
                    // Transient (recoverable) Failure, log the email address
                    listBox1.Items.Add("Transient Failure: " + bounce.BounceAddress);
                else if (bounce.BounceType == 8) 
                    // Subscribe request, log the email address
                    listBox1.Items.Add("Subscribe Request: " + bounce.BounceAddress);
                else if (bounce.BounceType == 9) 
                    // Unsubscribe Request, log the email address
                    listBox1.Items.Add("Unsubscribe Request: " + bounce.BounceAddress);
                else if (bounce.BounceType == 10) 
                    // Virus Notification, log the email address
                    listBox1.Items.Add("Virus Notification: " + bounce.BounceAddress);
                else if (bounce.BounceType == 11) 
                    // Suspected bounce.
                    // This should be rare.  It indicates that the Bounce
                    // component found strong evidence that this is a bounced
                    // email, but couldn//t quite recognize everything it
                    // needed to be 100% sure.  Feel free to notify
                    // support@chilkatsoft.com regarding emails having this
                    // bounce type.
                    listBox1.Items.Add("Suspected Bounce!");
                
                email = null;
                }
            bundle = null;
            }
        mailman = null;
        }
    }