For loop and if statement for multiple conditions

Question

I am having a head-scratching time with the if conditions. I will make it clear how the sheet is supposed to work.

When users select a value from the drop-down menus

Answer 1

This would be a good application for an Installable Edit Trigger function. See Google Sheets Events as well.

Note that you must use an installable trigger which will run as the document owner, not the simple onEdit() trigger that runs as an anonymous user, because sending an email requires user authorization.

Something like this (tested):

function installableOnEdit( e ) {
  if (!e) throw new Error( "Need event parameter." ); // see http://stackoverflow.com/a/16089067

  var changedCell = e.range;
  var row = e.range.getRow();
  var col = e.range.getColumn();
  var sheet = e.range.getSheet();

  var headers = sheet.getDataRange().getValues()[0]; // Get header row 1
  var statusCol = headers.indexOf('Reminder Email Status')+1;
  // Build an array of "rows we care about". If the headers change, this needs to be updated
  var teamCols = [ headers.indexOf('Team 1 (PM)')+1,
                   headers.indexOf('Team 2 (Colombo)')+1,
                   headers.indexOf('Team 3 (VCS)')+1 ];

  if (teamCols.indexOf(col) == -1) return;  // Exit if cell outside of the team columns

  var status = e.value.toUpperCase().replace(/ /g,"_");   // Change "Request Sent" to "REQUEST_SENT"
  sheet.getRange(row,statusCol).setValue(status);

  //--------- Put your emailing code here, or call a function
}

// Read user's current cell, and feed to installableOnEdit() as an event.
// see http://stackoverflow.com/a/16089067
function test_installableOnEdit() {
  installableOnEdit({
    user : Session.getActiveUser().getEmail(),
    source : SpreadsheetApp.getActiveSpreadsheet(),
    range : SpreadsheetApp.getActiveSpreadsheet().getActiveCell(),
    value : SpreadsheetApp.getActiveSpreadsheet().getActiveCell().getValue(),
    authMode : "LIMITED"
  });
}