Purge a POP3 account

PurgePop3Account.cs

using OpenPop.Pop3; // from http://www.nuget.org/packages/OpenPop.NET/
using System;

namespace PurgePop3Account
{
    class Program
    {
        static void Main(string[] args)
        {
            // use the pop3s scheme for SSL connection (recommended).
            // use the pop3 scheme for non-SSL connection.
            var accountUri = new Uri("pop3s://TODO_USERNAME:TODO_PASSWORD@TODO_HOSTNAME");

            while (true)
            {
                using (var client = CreatePopClient(accountUri))
                {
                    Console.WriteLine("Connected");

                    var messageCount = client.GetMessageCount();

                    Console.WriteLine("End poll. messageCount={0}", messageCount);

                    if (messageCount == 0)
                    {
                        Console.WriteLine("DONE!");
                        return;
                    }

                    // delete in batches.
                    messageCount = Math.Min(100, messageCount);

                    Console.WriteLine("Deleting a batch of {0} messages...", messageCount);

                    // NB message numbers start at 1.
                    for (var messageNumber = 1; messageNumber <= messageCount; ++messageNumber)
                    {
                        // NB the message is only actually deleted after we disconnect from the
                        //    server.  though, its marked as deleted and we cannot access it
                        //    anymore.  thats why we batch the deletes.
                        client.DeleteMessage(messageNumber);
                    }
                }
            }
        }

        private static Pop3Client CreatePopClient(Uri uri)
        {
            var ssl = uri.Scheme.EndsWith("s");
            var port = uri.Port > 0 ? uri.Port : (ssl ? 995 : 110);
            var userInfo = uri.UserInfo.Split(new[] { ':' }, 2);
            var username = Uri.UnescapeDataString(userInfo[0]);
            var password = Uri.UnescapeDataString(userInfo[1]);

            var client = new Pop3Client();

            Console.WriteLine("Connection to POP3 server at {0}:{1} SSL={2}", uri.Host, port, ssl);
            client.Connect(uri.Host, port, ssl);

            Console.WriteLine("Authenticating with user {0}", username);
            client.Authenticate(username, password);

            return client;
        }
    }
}