AppScript is not sending Emails automatically - google-apps-script

Question

Using below AppScript to sending an auto email based on Google Sheet values but its not working.
I have changed the Column reference according to the current columns but its not giving an error but also not sending the email.
can someone please look into this matter.
Your help will be greatly appreciated.
function Send_email() {
var INITIALline = 2;
var columnSEND = 5;
var STATUScolumn = 16;
var textCONDITION = "New Request";
var textSENT = "Mail_Sent"
var tab = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Data");
var interval = tab.getRange(INITIALline,1,tab.getLastRow()-INITIALline+1,STATUScolumn);
var dice = interval.getValues();
var yousent = false;
var email,subject,message;
for (var i=0; i<dice.length; ++i) {
if((dice[i][columnSEND-1]==textCONDITION) && (dice[i][STATUScolumn-1]!=textSENT)){
var email = dice[i][9]
subject = dice[i][6]+" | YOUR CASE ID IS | "+dice[i][0];
var message = "<font size='3' face='Comfortaa'>Dear "+dice[i][6]+",<br/><br/>"+
"Thanks for connecting with us."+dice[i][0]+".<br/><br/>"+
"<i>Thanks & Regards</i><br/>"+
"<b>VNA SERVICE TEAM </b>";
MailApp.sendEmail(email, subject, message,{ htmlBody: message});
tab.getRange(INITIALline+i,STATUScolumn).setValue(textSENT);
yousent = true;
SpreadsheetApp.flush();
}
}
}

Answer 1

In your Spreadsheet, it seems that Your issue is the column "E". But columnSEND is 15 by var columnSEND = 15 of your script in your question. In this case, the if statement of if((dice[i][columnSEND-1]==textCONDITION) && (dice[i][STATUScolumn-1]!=textSENT)){ checks the column "O". I think that this is the reason of your issue.
So in order to check the column "E", as a simple modification, how about the following modification?
From:
var columnSEND = 15;
To:
var columnSEND = 5;