How to Import emails from external email server using C#

using (Pop3Client cl = new Pop3Client())
{
    cl.UserName = "MyUserName";
    cl.Password = "MyPassword";
    cl.ServerName = "MyServer";
    cl.AuthenticateMode = Pop3AuthenticateMode.Pop;
    cl.Ssl = false;
    cl.Authenticate();
    ///Get first mail of my mailbox
    Pop3Message mg = cl.GetMessage(1);
    String MyText = mg.BodyText;
    ///If the message have one attachment
    Pop3Content ct = mg.Contents[0];        
    ///you can save it to local disk
    ct.DecodeData("your file path");
}

you can get it from codeplex

http://csharpmail.codeplex.com/

or you can use this

 // 
// create client, connect and log in 
Pop3 client = new Pop3();
client.Connect("pop3.example.org");
client.Login("username", "password");

// get message list 
Pop3MessageCollection list = client.GetMessageList();

if (list.Count == 0)
{
    Console.WriteLine("There are no messages in the mailbox.");
}
else 
{
    // download the first message 
    MailMessage message = client.GetMailMessage(list[0].SequenceNumber);
    ...
}

client.Disconnect();

hope your help!