/// <summary>
        /// Executes the POP3 DELE command.
        /// </summary>
        /// <param name="item">The item.</param>
        /// /// <exception cref="Pop3Exception">If the DELE command was unable to be executed successfully.</exception>
        public void Dele(Pop3ListItem item)
        {
            if (item == null)
            {
                throw new ArgumentNullException("item");
            }

            using (DeleCommand command = new DeleCommand(_clientStream, item.MessageId))
            {
                ExecuteCommand <Pop3Response, DeleCommand>(command);
            }
        }
        /// <summary>
        /// Retrs the specified message.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <returns>A MimeEntity for the requested Pop3 Mail Item.</returns>
        public MimeEntity RetrMimeEntity(Pop3ListItem item)
        {
            if (item == null)
            {
                throw new ArgumentNullException("item");
            }

            if (item.MessageId < 1)
            {
                throw new ArgumentOutOfRangeException("item.MessageId");
            }

            RetrResponse response;

            using (RetrCommand command = new RetrCommand(_clientStream, item.MessageId))
            {
                response = ExecuteCommand <RetrResponse, RetrCommand>(command);
            }

            MimeReader reader = new MimeReader(response.MessageLines);

            return(reader.CreateMimeEntity());
        }