Google apps script 需要一个脚本来发送电子邮件，而无需重新发送给以前录制的发件人

我正在使用下面的脚本，我从现有的sendEmail脚本中修改了该脚本。我正在收集谷歌表单上的信息，希望在每次“提交”时发送电子邮件。我遇到的问题是，脚本会发送到电子表格的每一行，即使这些信息已经发送了。我需要脚本以某种方式标记已发送的行，以便无法重新发送信息。我的“新手”方法是在发送邮件后将电子邮件地址更改为我的电子邮件地址。我过滤了我的收件箱以自动删除这些电子邮件。这是我粗略的解决方案，但我希望它能正常工作。有什么建议吗

 var EMAIL_SENT = "EMAIL_SENT";

    function sendEmails() {
      var ss = SpreadsheetApp.getActiveSpreadsheet();
      var dataSheet = ss.getSheets()[0];
      var dataRange = dataSheet.getRange(2, 1, dataSheet.getMaxRows() - 1, 17);

      var templateSheet = ss.getSheets()[1];
      var emailTemplate = templateSheet.getRange("A1").getValue();

  // Create one JavaScript object per row of data.
  objects = getRowsData(dataSheet, dataRange);

  // For every row object, create a personalized email from a template and send
  // it to the appropriate person.
  for (var i = 0; i < objects.length; ++i) {
    // Get a row object
        var rowData = objects[i];

    // Generate a personalized email.
    // Given a template string, replace markers (for instance ${"First Name"}) with
    // the corresponding value in a row object (for instance rowData.firstName).
        var emailText = fillInTemplateFromObject(emailTemplate, rowData);
        var emailSent = rowData[4];
        if (emailSent != EMAIL_SENT) {
          var emailSubject = "CCSS Walkthrough";
          MailApp.sendEmail(rowData.emailAddress, emailSubject, emailText);
          var startRow = 2;
          var sheet = SpreadsheetApp.getActiveSheet();
          sheet.getRange(startRow + i, 2).setValue("myemailaddress");
          SpreadsheetApp.flush ();
    }
   } 
}


// Replaces markers in a template string with values define in a JavaScript data object.
// Arguments:
//   - template: string containing markers, for instance ${"Column name"}
//   - data: JavaScript object with values to that will replace markers. For instance
//           data.columnName will replace marker ${"Column name"}
// Returns a string without markers. If no data is found to replace a marker, it is
// simply removed.
    function fillInTemplateFromObject(template, data) {
      var email = template;
  // Search for all the variables to be replaced, for instance ${"Column name"}
      var templateVars = template.match(/\${\"[^\"]+\"\}/g);

  // Replace variables from the template with the actual values from the data object.
  // If no value is available, replace with the empty string.
      for (var i = 0; i < templateVars.length; ++i) {
    // normalizeHeader ignores ${"} so we can call it directly here.
        var variableData = data[normalizeHeader(templateVars[i])];
        email = email.replace(templateVars[i], variableData || "");
  }

      return email;
}





//////////////////////////////////////////////////////////////////////////////////////////
//
// The code below is reused from the 'Reading Spreadsheet data using JavaScript Objects'
// tutorial.
//
//////////////////////////////////////////////////////////////////////////////////////////

// getRowsData iterates row by row in the input range and returns an array of objects.
// Each object contains all the data for a given row, indexed by its normalized column name.
// Arguments:
//   - sheet: the sheet object that contains the data to be processed
//   - range: the exact range of cells where the data is stored
//   - columnHeadersRowIndex: specifies the row number where the column names are stored.
//       This argument is optional and it defaults to the row immediately above range; 
// Returns an Array of objects.
    function getRowsData(sheet, range, columnHeadersRowIndex) {
      columnHeadersRowIndex = columnHeadersRowIndex || range.getRowIndex() - 1;
      var numColumns = range.getEndColumn() - range.getColumn() + 1;
      var headersRange = sheet.getRange(columnHeadersRowIndex, range.getColumn(), 1,       numColumns);
      var headers = headersRange.getValues()[0];
      return getObjects(range.getValues(), normalizeHeaders(headers));
}

// For every row of data in data, generates an object that contains the data. Names of
// object fields are defined in keys.
// Arguments:
//   - data: JavaScript 2d array
//   - keys: Array of Strings that define the property names for the objects to create
    function getObjects(data, keys) {
      var objects = [];
      for (var i = 0; i < data.length; ++i) {
        var object = {};
        var hasData = false;
        for (var j = 0; j < data[i].length; ++j) {
          var cellData = data[i][j];
          if (isCellEmpty(cellData)) {
            continue;
      }
      object[keys[j]] = cellData;
      hasData = true;
    }
    if (hasData) {
      objects.push(object);
    }
  }
  return objects;
}

// Returns an Array of normalized Strings.
// Arguments:
//   - headers: Array of Strings to normalize
    function normalizeHeaders(headers) {
      var keys = [];
      for (var i = 0; i < headers.length; ++i) {
        var key = normalizeHeader(headers[i]);
        if (key.length > 0) {
          keys.push(key);
    }
  }
  return keys;
}

// Normalizes a string, by removing all alphanumeric characters and using mixed case
// to separate words. The output will always start with a lower case letter.
// This function is designed to produce JavaScript object property names.
// Arguments:
//   - header: string to normalize
// Examples:
//   "First Name" -> "firstName"
//   "Market Cap (millions) -> "marketCapMillions
//   "1 number at the beginning is ignored" -> "numberAtTheBeginningIsIgnored"
    function normalizeHeader(header) {
      var key = "";
      var upperCase = false;
      for (var i = 0; i < header.length; ++i) {
        var letter = header[i];
        if (letter == " " && key.length > 0) {
          upperCase = true;
          continue;
    }
        if (!isAlnum(letter)) {
          continue;
    }
        if (key.length == 0 && isDigit(letter)) {
          continue; // first character must be a letter
    }
        if (upperCase) {
          upperCase = false;
          key += letter.toUpperCase();
    }     else {
          key += letter.toLowerCase();
    }
  }
  return key;
}

// Returns true if the cell where cellData was read from is empty.
// Arguments:
//   - cellData: string
    function isCellEmpty(cellData) {
      return typeof(cellData) == "string" && cellData == "";
}

// Returns true if the character char is alphabetical, false otherwise.
    function isAlnum(char) {
       return char >= 'A' && char <= 'Z' ||
        char >= 'a' && char <= 'z' ||
        isDigit(char);
}

// Returns true if the character char is a digit, false otherwise. 
    function isDigit(char) {
      return char >= '0' && char <= '9';
}

var EMAIL\u SENT=“EMAIL\u SENT”；
函数sendEmails（）{
var ss=SpreadsheetApp.getActiveSpreadsheet（）；
var dataSheet=ss.getSheets（）[0]；
var dataRange=dataSheet.getRange（2,1，dataSheet.getMaxRows（）-1,17）；
var templateSheet=ss.getSheets（）[1]；
var emailTemplate=templateSheet.getRange（“A1”）.getValue（）；
//每行数据创建一个JavaScript对象。
对象=getRowsData（数据表，数据范围）；
//对于每个行对象，从模板创建个性化电子邮件并发送
//把它交给合适的人。
对于（变量i=0；i0）{
按键。按（键）；
}
}
返回键；
}
//通过删除所有字母数字字符并使用大小写混合，规范化字符串
//分词。输出将始终以小写字母开头。
//此函数用于生成JavaScript对象属性名称。
//论据：
//-标题：要规范化的字符串
//示例：
//“名字”->“名字”
//“市值（百万）->”市值百万
//“忽略开头的1个数字”->“数字开头已签名”
函数规范化标头（标头）{
function onFormSubmit(event) { //On form submission send an email to the approver.
 var sheet = SpreadsheetApp.getActiveSheet();
     //Get values that have to be put on the email.
     //event.values[index] is indexed in the same order that form values are ordered        on the spreadhseet
var formVal1 = event.values[0]; 
var formVal2 = event.values[1];
.
.
.
.
. 
var  formValN = event.values[N];
//Setting the message that goes on the email sent to the approver.
var message = 'This message has the following information from the form submit: '+ formVal1+'blah blah' + formVal2+...........+formValN;
//Title for the mail sent.
var title = 'New Submission';
//Email address the email is sent to.
var mailAdd = 'example@receiveemail.com' //this could be an array for multiple recipients.
//Sending Email.   
MailApp.sendEmail(mailAdd, title, message);
}