Google sheets script to send email

Question

link to the sheet

I just need the script (sendEmail02()) to collect data from the table of only the person whose mail is contained in column 2 and send him all

Answer 1

This function collects all of the messages for each recipient and sends each recipient one email with all messages in it. I modified the messages to make them simpler for debugging purposes so you will need to rewrite your messages.

I also used a dialog to display message content rather than sending emails so you'll have to enable that and test it yourself.

function sendEmail02() {
  var ss=SpreadsheetApp.getActive();
  var sh=ss.getSheetByName('Sheet1');
  if (sh.getName()=='Sheet1')  {
    var rg=sh.getRange(2,1,sh.getLastRow()-1,3);//What about column 4?
    var v=rg.getValues();
    var mObj={rA:[]};
    var html='';
    for (var i=0;i<v.length;i++) {
      if (v[i][0]=="sent" && v[i][1]!="" && v[1][2] != "") {
        var message=Utilities.formatString('<br />Email:%s Text:%s',v[i][1],v[i][2]);
        if(mObj.hasOwnProperty(v[i][1])) {
          mObj[v[i][1]]+=message;
          mObj[v[i][1]+'rows'].push(i+2);
        } else {
          mObj[v[i][1]]=message;
          mObj.rA.push(v[i][1]);
          mObj[v[i][1]+'rows']=[];
          mObj[v[i][1]+'rows'].push(i+2);
        } 
      }
    }
    for(var i=0;i<mObj.rA.length;i++) {
      var SendTo=mObj.rA[i];
      var Subject = "Hello" ;
      //MailApp.sendEmail({bcc: SendTo,subject: Subject,htmlBody: mObj[mObj.rA[i]]+});
      html+=Utilities.formatString('<br />Recipient: %s<br />Subject; %s<br />Message: <br />%s<br /><hr width="100%">',SendTo,Subject,mObj[mObj.rA[i]])
      for(var j=0;j<mObj[mObj.rA[i]+'rows'].length;j++) {
        sh.getRange(mObj[mObj.rA[i]+'rows'][j],1).setValue("done");
      }
    }
    var ui=HtmlService.createHtmlOutput(html).setWidth(1000);
    SpreadsheetApp.getUi().showModelessDialog(ui, "Emails Sent");
  }
}

I tested it with you data and this is the dialog output after setting all the lines in column one to sent.

Recipient: test01@gmail.com
Subject; Hello
Message:

Email:test01@gmail.com Text:Data1
Email:test01@gmail.com Text:Data2
Email:test01@gmail.com Text:Data3
Email:test01@gmail.com Text:Data6
Email:test01@gmail.com Text:Data7

Recipient: test02@gmail.com
Subject; Hello
Message:

Email:test02@gmail.com Text:Data4

Recipient: test03@gmail.com
Subject; Hello
Message:

Email:test03@gmail.com Text:Data5
Email:test03@gmail.com Text:Data8
Email:test03@gmail.com Text:Data9