C# 如何从C代码中重新启用Gmail中的pop？

我有一个从我的Gmail下载邮件的程序，我选择了单选按钮：为所有邮件启用POP，即使是已经下载的邮件

下载邮件后，我的Gmail将上述状态更改为：对自当前日期以来收到的所有邮件启用POP

我没有实际更改单选按钮，但它自动设置为只下载新邮件

我需要我的窗户，以下载我所有的时间

我如何在代码中设置Gmail必须始终启用所有下载？我不必每次都去重新选择单选按钮

Windows服务

 namespace EmailWindowsService
{
    public partial class MyEmailService : ServiceBase
    {
        private static System.Timers.Timer aTimer; //Create a timer
        public MyEmailService()
        {
            InitializeComponent();
            if (!System.Diagnostics.EventLog.SourceExists("MySource")) // Log every event
            {
                System.Diagnostics.EventLog.CreateEventSource(
                    "MySource", "MyNewLog"); // Create event source can view in Server explorer
            }
            eventLogEmail.Source = "MySource";
            eventLogEmail.Log = "MyNewLog";
            // Timer Code
             aTimer = new System.Timers.Timer(1 * 60 * 1000); // 60 seconds
             aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent); // Call time elapsed event
             aTimer.Enabled = true;
            // Timer Code
        }
        protected override void OnStart(string[] args)
        {
            eventLogEmail.WriteEntry("Started");
        }
        protected override void OnStop()
        {
            eventLogEmail.WriteEntry("Stopped");
        }
        protected override void OnPause()
        {
            eventLogEmail.WriteEntry("Paused");
        }
        protected override void OnContinue()
        {    
            eventLogEmail.WriteEntry("Continuing");
        }
        protected override void OnShutdown()
        {
            eventLogEmail.WriteEntry("ShutDowned");
        }
        private void OnTimedEvent(object source, ElapsedEventArgs e)
        {
            clsRetriveEmail Emails = new clsRetriveEmail();
            eventLogEmail.WriteEntry("Populateing database with mail"); // log event
            Emails.EmailGetList(); // Call class
        }       
        }
    }

阶级

---

您不需要重新启用单选按钮，当pop客户端下载邮件时，其他pop客户端无法查看该邮件。outlook是如何通过使用“最新”模式实现这一点的

试试看，这不是你所有的邮件，而是最近30天的邮件

只需将最近：添加到您的用户名中，例如最近：Me@gmail.com.

最近模式获取最近30天的邮件，而不管它是否已经发送到另一个POP1客户端

链接以备份它

namespace EmailWindowsService
{
    class clsRetriveEmail
    {
        public void EmailGetList()
        {          
            using (Pop3Client objClient = new Pop3Client())
            {
                //Athentication This is stored in the app.config file
                objClient.Connect(Properties.Settings.Default.mailServer, Properties.Settings.Default.port, Properties.Settings.Default.ssl); // mailserver eg gmail is pop.gmail.com, Port common ports 995 110 sll Security best to set to true
                objClient.Authenticate(Properties.Settings.Default.username, Properties.Settings.Default.password);  // Email Address and password
                //Count Emails and begin Looping though them
                int emailCount = objClient.GetMessageCount();
                for (int i = emailCount; i >= 1; i--)
                {
                   OpenPop.Mime.Message msg = objClient.GetMessage(i); //Get message Number. Message decleard as msg
                    //Set the values to throw into Database
                   int emailID = i;
                   String emailTo = Properties.Settings.Default.username;
                   String emailFrom = msg.Headers.From.Address;
                   String emailSubject = msg.Headers.Subject;
                   DateTime emailSentDate = msg.Headers.DateSent;
                    // The connection String can be changed in the app.config file
                    // Connect to database
                    using (var conn = new SqlConnection(Properties.Settings.Default.dbConnectionString))
                    using (var cmd = conn.CreateCommand())
                    {
                            // Writes to database (local) instance
                            conn.Open();
                            cmd.CommandText = "EmailLogFill";
                            cmd.CommandType = CommandType.StoredProcedure;
                            cmd.Parameters.AddWithValue("@id", emailID);
                            cmd.Parameters.AddWithValue("@to", emailTo);
                            cmd.Parameters.AddWithValue("@from", emailFrom);
                            cmd.Parameters.AddWithValue("@subject", emailSubject);
                            cmd.Parameters.AddWithValue("@date", emailSentDate);
                            cmd.ExecuteNonQuery();
                    }
                }
            }
        }
    }
}