Not able to copy sheet1 data to sheet2 in specific format - google-apps-script

Question

https://docs.google.com/spreadsheets/d/18odtLaamxJISS7Gq-N-xPxVu1Fk55AYQoFojkmIgxbM/edit#gid=0
function myFunction() {
function sendEmails() {
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Messages from BOs");
var startRow = 4; // First row of data to process
var numRows = 1; // Number of rows to process
// Fetch the range of cells A4:C3
var dataRange = sheet.getRange(startRow, 1, numRows, 3);
// Fetch values for each row in the Range.
var data = dataRange.getValues();
for (var i in data) {
var row = data[i];
var emailAddress = row[0]; // First column
var subject = row[1];
var message = row[2]; // Second column
MailApp.sendEmail(emailAddress, subject, message);
}
for (var i in data, i++) {
var row1 = data[i];
Browser.msgBox(data[i+1])
/**
var emailAddress1 = row[0]; // First column
var subject2 = row[1];
var message3 = row[2]; // Second column
*/
var ad = row1;
var ts = SpreadsheetApp.getActiveSpreadsheet().getSheetByName('Test');
ts.getRange(startRow, i+1 ).setValue(row1);
//i = i + 1;
}
}
}
Here i wanted to update sheet2 every time when email send to "Recipient EMAL ID" to the new row of sheet2.
Please see my google sheet. I tried below code but it does not work well. If any who can help me in solve this problem.

Answer 1

Try to change:
ts.getRange(startRow, i+1 ).setValue(row1);
with:
ts.appenRow(row1);
https://developers.google.com/apps-script/reference/spreadsheet/sheet#appendRow(Object)

Answer 2

This is a lot simpler:
function sendEmails() {
const ss = SpreadsheetApp.getActive()
var sh = ss.getSheetByName("Messages from BOs");
var ts = ss.getSheetByName('Test');
var sr = 4; // First row of data to process
var rg = sh.getRange(sr, 1, 1, 3);
var vs = rg.getValues();
vs.forEach(row => {
MailApp.sendEmail(row[0], row[1], row[2]);
ts.appendRow(row);
});
}