Retrieve Email with Event Handler in C#

In previous section, I introduced how to retrieve email from Hotmail/MSN Live account. In this section, I will introduce how to retrieve email with event handler in C#.


After Connect method, GetMail method or other methods are invoked, if you want to know the progress of the email receiving, you should use Event Handler. The following sample codes demonstrate how to use Event Handler to monitor the progress of email receiving.


Remarks: All of examples in this section are based on first section: A simple C# project. To compile and run the following example codes successfully, please click here to learn how to create the test project and add reference to your project.

[C# Example - Retrieve email with event handler]

The following example codes demonstrate how to use EAGetMail POP3 component to retrieve email with event handler. In order to run it correctly, please change email server, user, password, folder, file name values.


To get the full sample projects, please refer to Samples section.

using System;
using System.Globalization;
using System.IO;
using EAGetMail; //add EAGetMail namespace

namespace receiveemail
    class Program
        private static void OnConnected(object sender, ref bool cancel)

        private static void OnQuit(object sender, ref bool cancel)
            Console.WriteLine( "Quit");

        private static void OnReceivingDataStream(object sender,
            MailInfo info, int received, int total, ref bool cancel)
            Console.WriteLine(String.Format("Receiving {0}, {1}/{2}...", info.Index,
                received, total));

        private static void OnIdle(object sender, ref bool cancel)

        private static void OnAuthorized(object sender, ref bool cancel)

        private static void OnSecuring(object sender, ref bool cancel)

        // Generate an unqiue email file name based on date time
        static string _generateFileName(int sequence)
            DateTime currentDateTime = DateTime.Now;
            return string.Format("{0}-{1:000}-{2:000}.eml",
                currentDateTime.ToString("yyyyMMddHHmmss", new CultureInfo("en-US")),

        static void Main(string[] args)
                // Create a folder named "inbox" under current directory
                // to save the email retrieved.
                string localInbox = string.Format("{0}\\inbox", Directory.GetCurrentDirectory());
                // If the folder is not existed, create it.
                if (!Directory.Exists(localInbox))

                MailServer oServer = new MailServer("",

                // Enable SSL/TLS connection, most modern email server require SSL/TLS by default
                oServer.SSLConnection = true;
                oServer.Port = 995;

                // if your server doesn't support SSL/TLS, please use the following codes
                // oServer.SSLConnection = false;
                // oServer.Port = 110;

                MailClient oClient = new MailClient("TryIt");

                // Catching the following events is not necessary,
                // just make the application more user friendly.
                // If you use the object in service or non-gui application,
                // You don't have to catch the following events.
                oClient.OnAuthorized += new MailClient.OnAuthorizedEventHandler(OnAuthorized);
                oClient.OnConnected += new MailClient.OnConnectedEventHandler(OnConnected);
                oClient.OnIdle += new MailClient.OnIdleEventHandler(OnIdle);
                oClient.OnSecuring += new MailClient.OnSecuringEventHandler(OnSecuring);
                oClient.OnReceivingDataStream +=
                    new MailClient.OnReceivingDataStreamEventHandler(OnReceivingDataStream);


                MailInfo[] infos = oClient.GetMailInfos();
                Console.WriteLine("Total {0} email(s)\r\n", infos.Length);
                for (int i = 0; i < infos.Length; i++)
                    MailInfo info = infos[i];
                    Console.WriteLine("Index: {0}; Size: {1}; UIDL: {2}",
                        info.Index, info.Size, info.UIDL);

                    // Receive email from POP3 server
                    Mail oMail = oClient.GetMail(info);

                    Console.WriteLine("From: {0}", oMail.From.ToString());
                    Console.WriteLine("Subject: {0}\r\n", oMail.Subject);

                    // Generate an unqiue email file name based on date time.
                    string fileName = _generateFileName(i + 1);
                    string fullPath = string.Format("{0}\\{1}", localInbox, fileName);

                    // Save email to local disk
                    oMail.SaveAs(fullPath, true);

                    // Mark email as deleted from POP3 server.

                // Quit and expunge emails marked as deleted from POP3 server.
            catch (Exception ep)

Next Section

At next section I will introduce how to use UIDL function to mark the email has been downloaded.



If you have any comments or questions about above example codes, please click here to add your comments.