.NET POP3 MIME Client

using System;
using System.Collections.Generic;
using System.Text;

namespace Net.Mail
{
    [Flags()]
    public enum Pop3State
    {
        /// <summary>
        /// Undefined.
        /// </summary>
        Unknown = 0,
        /// <summary>
        /// Connected to Pop3 server, but not authorized.
        /// May issue any of the following commands QUIT, USER, PASS
        /// </summary>
        Authorization = 1,
        /// <summary>
        /// Authorized to Pop3 server, can issue any of the following commands;
        /// STAT, LIST, RETR, DELE, RSET
        /// </summary>
        Transaction = 2,
        /// <summary>
        /// Quit command was sent to server indicating deleted
        /// messages should be removed.
        /// </summary>
        Update = 4
    }
}