public CommandRequestBuilder(AwsCredentials credentials)
        {
            if (credentials == null)
            {
                throw new ArgumentNullException("credentials");
            }

            this._credentials = credentials;
            this._address     = "https://email.us-east-1.amazonaws.com";
        }
		public CommandRequestBuilder(AwsCredentials credentials)
		{
			if (credentials == null)
			{
				throw new ArgumentNullException("credentials");
			}

			this._credentials = credentials;
			this._address = "https://email.us-east-1.amazonaws.com";

		}
        public CommandRequestBuilder(AwsCredentials credentials, string address)
        {
            if (credentials == null)
            {
                throw new ArgumentNullException("credentials");
            }

            if (address == null)
            {
                throw new ArgumentNullException("address");
            }

            this._credentials = credentials;
            this._address     = address;
        }
		public CommandRequestBuilder(AwsCredentials credentials, string address)
		{
			if (credentials == null)
			{
				throw new ArgumentNullException("credentials");
			}

			if (address == null)
			{
				throw new ArgumentNullException("address");
			}

			this._credentials = credentials;
			this._address = address;

		}