Google Apps Script sendEmail: multiple recipients string? - google-apps-script

Question

Using sendEmail, how can I send an email to multiple comma-separated recipients by combining two form fields? It seems to work when (lastrow,4) has only one value (abc#domain.com) but not for more than one (abc#domain.com, xyz#domain.com). Current code is below, and the variable in question is recipientsTo.
function FormEmail() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheetform = ss.getSheetByName("Sheet1"); // Name of the sheet which contains the results
var lastrow = sheetform.getLastRow();
var recipientsTO = sheetform.getRange(lastrow,3).getValue() + "#domain.com";
var recipientsCC = ""
var team = sheetform.getRange(lastrow,5).getValue();
var datestamp = Utilities.formatDate(sheetform.getRange(lastrow,1).getValue(), "GMT - 5", "yyyy-MM-dd");
var html = "Intro text;
//The questions order in the email will be the order of the column in the sheet
for (var i = 2; i < 11; ++i) {
html = html + "<b>" + sheetform.getRange(1,i).getValue() + "</b><br>";
html = html + sheetform.getRange(lastrow,i).getValue() + "</p><br>";
}
//Add additional emails if entered in form field
if (sheetform.getRange(lastrow,4).getValue() !== "") {
recipientsTO = recipientsTO + "," + sheetform.getRange(lastrow,4).getValue()
}
//CC if response to a question is "Yes"
if (sheetform.getRange(lastrow,10).getValue() == "Yes") {
recipientsCC = "ccEmaIL#gmail.com"
}
MailApp.sendEmail({
to: recipientsTO,
cc: recipientsCC,
subject: "Subject",
htmlBody: html,
});
}

Answer 1

According to the sendEmail(message) documentation, the TO field only has one recipient.
Whereas the CC field can have multiple recipients separated by comma.
http://goo.gl/CGjiJ
`to - String - the address of the recipient.
cc -String - a comma separated list of email addresses to CC`
Another option would be to use sendEmail(String,String,String,Object) in that function "recipient String the addresses of the recipients, separated by commas".
Hope this helps.

Answer 2

Here is code from my production script:
//check quota and log
const emailsLeft = MailApp.getRemainingDailyQuota();
console.log( emailsLeft + " emails left in quota");
//get list of emails from spreadsheet itself
//filter out empty rows
const emails = getTab("Config").getRange("D2:D").getValues().map(function(el){ return el[0]; }).filter(function(el){ return el != '' });
//send emails from NO_REPLY email, subject and HTML body
MailApp.sendEmail({
to: emails.join(","),
subject: subject,
htmlBody: html,
noReply: true
});
function getTab(name) {
var sheet = SpreadsheetApp.getActiveSpreadsheet();
return sheet.getSheetByName(name);
}
getTab() and other helper functions can be found here
https://github.com/tim-kozak/google-spreadsheet-helpers