Count number of Gmail emails per sender

Question

I\'m trying to do a mass cleanout of my Gmail because search has gotten so slow. I would like to tally how many emails i\'ve received from each sender. The closest solutio

Answer 1

This will get you a unique sender list

function sender_list() {
  var inbox_threads=GmailApp.search('in:anywhere');
  var sender_array=[];
  var uA=[];
  for(var i=0;i<inbox_threads.length;i++) {
    var message=inbox_threads[i].getMessages();
    for(var x=0;x<message.length; x++) {
      var sender=message[x].getFrom();  
      //prevent duplicates
      if(uA.indexOf(sender)==-1) {
        uA.push(sender);
        sender_array.push([sender]);      
      }
    }
  }
  var ss=SpreadsheetApp.getActive();
  var sh=ss.getActiveSheet()
  sh.clear();
  sh.appendRow(['Email Address']);
  sh.getRange(2, 1,sender_array.length,1).setValues(sender_array).sort({column:1,ascending:true});

}

and this version adds the number of emails per sender:

function sender_list() {
  var inbox_threads=GmailApp.search('in:anywhere');
  var sender_array=[];
  var uA=[];
  var cObj={};
  for(var i=0;i<inbox_threads.length;i++) {
    var message=inbox_threads[i].getMessages();
    for(var x=0;x<message.length; x++) {
      var sender=message[x].getFrom();  
      if(uA.indexOf(sender)==-1) {
        uA.push(sender);
        sender_array.push([sender]);
        cObj[sender]=1;
      }else{
        cObj[sender]+=1;
      }
    }
  }
  sender_array.forEach(function(r){
    r.splice(1,0,cObj[r[0]]);
  });
  var ss=SpreadsheetApp.getActive();
  var sh=ss.getActiveSheet()
  sh.clear();
  sh.appendRow(['Email Address','Count']);
  sh.getRange(2, 1,sender_array.length,2).setValues(sender_array).sort({column:1,ascending:true});

}

I have about 500 emails total. I don't store a lot of emails and I discard a lot of unwanted emails when they arrive. It took about 20 seconds to run. So I would imagine 100K emails will require you to run this in batches.

Batch Operations

The following code requires that that Gmail API be enabled.

To do a batch you could run this function to start with:

function sender_list_paged(token) {
  var token=token||null;
  var query="in:anywhere"; 
  var sender_array=[];
  var uA=[]
  var cObj={};
  do{
    var result=Gmail.Users.Messages.list("your gmail address", {maxResults:100,pageToken:token,q:query});
    var list=result;
    Logger.log(list);
    for(var i=0;i<list.messages.length;i++) {
      var sender=GmailApp.getMessageById(list.messages[i].id).getFrom();
      if(uA.indexOf(sender)==-1) {
        uA.push(sender);
        sender_array.push([sender]);
        cObj[sender]=1;
      }else{
        cObj[sender]+=1;
      }
    }
    token=list.nextPageToken
    PropertiesService.getUserProperties().setProperty("lastpagetoken", token);
  }while(token);
  sender_array.forEach(function(r){
    r.splice(1,0,cObj[r[0]]);
  });
  var ss=SpreadsheetApp.getActive();
  var sh=ss.getActiveSheet()
  sh.clear();
  sh.appendRow(['Email Address','Count']);
  sh.getRange(2, 1,sender_array.length,2).setValues(sender_array).sort({column:1,ascending:true});
}

And then run the function again like this:

sender_list_paged(getLastPageToken());

function getLastPageToken() {
  return PropertiesService.getUserProperties().getProperty("lastpagetoken")
}

And I think that will work. But you may have to play with it as I haven't ever had to do that.