How to Create a Spam Filter or Automatic Category Sort Algorithm with Your Mail Application

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using HigLabo.Net.Mail;
using HigLabo.Net.Smtp;
using HigLabo.Net.Pop3;
using HigLabo.Net.Imap;

namespace HigLabo.Mail.SampleApplication
{
    class Program
    {
        private static String UserName = "@gmail.com";
        private static String Password = "secret";
        static void Main(string[] args)
        {
            SmtpMailSend();
            //Change method what you want to execute....
        }
        private static void SmtpMailSend()
        {
            using (var cl = new SmtpClient("smtp.gmail.com"))
            {
                cl.Port = 587;
                cl.Tls = true;
                cl.AuthenticateMode = SmtpAuthenticateMode.Auto;
                cl.UserName = UserName;
                cl.Password = Password;

                SmtpMessage mg = new SmtpMessage();
                mg.ContentEncoding = Encoding.GetEncoding("iso-8859-1");
                mg.ContentTransferEncoding = TransferEncoding.QuotedPrintable;
                mg.HeaderEncoding = Encoding.GetEncoding("iso-8859-1");
                mg.HeaderTransferEncoding = TransferEncoding.QuotedPrintable;
                mg.Date = DateTime.Now.ToUniversalTime();
                mg["Mime-Version"] = "1.0";
                mg.From = "your_name@hotmail.com";
                mg.ReplyTo = "your_name@hotmail.com";
                // set recipients
                mg.To.Add(new MailAddress("you_want_to_send_to@gmail.com"));
                // set subject if necessary
                mg.Subject = "It is a sample mail";
                // set body if necessary
                mg.BodyText = "You can send these char!äÄöÖüÜß";
                SmtpContent ct = new SmtpContent();
                mg.Contents.Add(ct);
                // send message
                SendMailResult rs = cl.SendMail(mg);
                if (rs.SendSuccessful == false)
                {
                    Console.WriteLine("Success");
                }
            }
        }
        private static void Pop3MailReceive()
        {
            MailMessage mg = null;

            using (Pop3Client cl = new Pop3Client("pop.gmail.com", 995, UserName, Password))
            {
                cl.Ssl = true;
                cl.AuthenticateMode = Pop3AuthenticateMode.Auto;
                var bl = cl.Authenticate();
                if (bl == true)
                {
                    var l = cl.ExecuteList();
                    for (int i = 0; i < l.Count; i++)
                    {
                        mg = cl.GetMessage(l[i].MailIndex);
                        foreach (var ct in mg.Contents)
                        {
                            ct.DecodeData("C:\\" + ct.FileName);
                        }
                    }
                }
            }
        }
        private static void Pop3MailReceiveUnRead()
        {
            using (Pop3Client cl = new Pop3Client("pop.gmail.com", 995, UserName, Password))
            {
                cl.Ssl = true;
                cl.AuthenticateMode = Pop3AuthenticateMode.Auto;
                var bl = cl.Authenticate();
                if (bl == true)
                {
                    var ul = cl.ExecuteUidl();
                    String path = "C:\\MailUidl.txt";
                    List<String> l = new List<String>();
                    //Get read mail index list from file
                    if (File.Exists(path) == true)
                    {
                        l.AddRange(File.ReadAllLines(path));
                    }
                    List<UidlCommandResult> unreadList = new List<UidlCommandResult>();
                    for (int i = 0; i < ul.Count; i++)
                    {
                        if (l.Contains(ul[i].Uid) == true) { continue; }
                        unreadList.Add(ul[i]);
                    }
                    //Save UIDL data to text file
                    StringBuilder sb = new StringBuilder(ul.Count * 23);
                    for (int i = 0; i < ul.Count; i++)
                    {
                        sb.AppendLine(ul[i].Uid);
                    }
                    File.WriteAllText(path, sb.ToString());
                }
            }
        }
        private static void Pop3MailDelete()
        {
            using (Pop3Client cl = new Pop3Client("pop.gmail.com", 995, UserName, Password))
            {
                cl.Ssl = true;
                //Mark as delete candidate
                cl.DeleteEMail(1, 2, 3, 4);
                //Delete from mailbox.
                cl.ExecuteQuit();
            }
        }
        private static void ImapMailReceive()
        {
            MailMessage mg = null;

            using (ImapClient cl = new ImapClient("imap.gmail.com", 993, UserName, Password))
            {
                cl.Ssl = true;
                var bl = cl.Authenticate();
                if (bl == true)
                {
                    //Select folder
                    var folder = cl.SelectFolder("[Gmail]/All Mail");
                    //Get all mail from folder
                    for (int i = 0; i < folder.MailCount; i++)
                    {
                        mg = cl.GetMessage(i + 1);
                    }
                }
            }
        }
        private static void ImapMailSearch()
        {
            MailMessage mg = null;

            using (ImapClient cl = new ImapClient("imap.gmail.com", 993, UserName, Password))
            {
                cl.Ssl = true;
                var bl = cl.Authenticate();
                if (bl == true)
                {
                    //Select folder
                    var folder = cl.SelectFolder("[Gmail]/All Mail");
                    //Search Unread
                    var list = cl.ExecuteSearch("UNSEEN UNDELETED");
                    //Get all unread mail
                    for (int i = 0; i < list.MailIndexList.Count; i++)
                    {
                        mg = cl.GetMessage(list.MailIndexList[i]);
                    }
                }
            }
        }
        private static void ImapMailDraft()
        {
            using (ImapClient cl = new ImapClient("imap.gmail.com", 993, UserName, Password))
            {
                cl.Ssl = true;
                var bl = cl.Authenticate();
                if (bl == true)
                {
                    //Add Draft
                    var smg = new SmtpMessage("xxx@gmail.com", "yyy@hotmail.com", "", "This is draft", "Hi.");
                    cl.ExecuteAppend("GMail/Drafts", smg.GetDataText(), "\\Draft", DateTimeOffset.Now);
                }
            }
        }
        private static void ImapMailSubscribe()
        {
            using (ImapClient cl = new ImapClient("imap.gmail.com", 993, UserName, Password))
            {
                cl.Ssl = true;
                var bl = cl.Authenticate();
                if (bl == true)
                {
                    cl.ExecuteSubscribe("[Gmail]/すべてのメール");
                    cl.ExecuteSubscribe("[Gmail]/");
                }
            }
        }
        private static void ImapMailGetSubscribeList()
        {
            using (ImapClient cl = new ImapClient("imap.gmail.com", 993, UserName, Password))
            {
                cl.Ssl = true;
                if (cl.Authenticate() == true)
                {
                    var rs = cl.ExecuteLsub("", false);
                    foreach (var line in rs.Lines)
                    {
                        var folder = new ImapFolder(line);
                    }
                }
            }
        }
        private static void ImapIdle()
        {
            using (ImapClient cl = new ImapClient("imap.gmail.com", 993, UserName, Password))
            {
                cl.Ssl = true;
                cl.ReceiveTimeout = 10 * 60 * 1000; //10 minute
                if (cl.Authenticate() == true)
                {
                    var l = cl.GetAllFolders();
                    ImapFolder r = cl.SelectFolder("INBOX");
                    using (var cm = cl.CreateImapIdleCommand()) //You must dispose ImapIdleCommand!
                    {
                        cm.MessageReceived += (Object o, ImapIdleCommandMessageReceivedEventArgs e) =>
                        {
                            foreach (var mg in e.MessageList)
                            {
                                String text = String.Format("Type is {0} Number is {1}", mg.MessageType, mg.Number);
                                Console.WriteLine(text);
                            }
                        };
                        cl.ExecuteIdle(cm);

                        while (true)
                        {
                            var line = Console.ReadLine();
                            if (line == "done")
                            {
                                cl.ExecuteDone(cm);
                                break;
                            }
                        }
                    }
                }
            }
        }
    }
}