Find Google Contacts with no Gmail Conversations

Your contacts list in Gmail is huge and you would like to trim it to only have email addresses with whom you have interacted at least once.

This Google Script, courtesy @crosenblub, will scan your entire address book and marks addresses with who you have never exchanged a single email conversation.

The contacts are put in a separate Google Contacts group making it easier for you to scan and clean the list.

function GetGmailContacts() {
  // get all contacts
  var contacts = ContactsApp.getContacts();

  // assign object for contact group
  var group = ContactsApp.getContactGroup('ToBeDeleted');

  // loop through each contact
  for (var i = 0; i < contacts.length; i++) {
    // get current email address
    email = contacts[i].getPrimaryEmail();

    // check if email is not null
    if (!(email == null)) {
      // check message count
      count ='from:' + email).length;

      // if count is zero or null then add that user to Group called Blacklist
      if (count == 0 || count == null) {
        // add this user to the "ToBeDeleted" contact group
Amit Agarwal

Amit Agarwal

Google Developer Expert, Google Cloud Champion

Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India.

Amit has developed several popular Google add-ons including Mail Merge for Gmail and Document Studio. Read more on Lifehacker and YourStory


Awards & Titles

Digital Inspiration has won several awards since it's launch in 2004.

Google Developer Expert

Google Developer Expert

Google awarded us the Google Developer Expert award recogizing our work in Google Workspace.

ProductHunt Golden Kitty

ProductHunt Golden Kitty

Our Gmail tool won the Lifehack of the Year award at ProductHunt Golden Kitty Awards in 2017.

Microsoft MVP Alumni

Microsoft MVP Alumni

Microsoft awarded us the Most Valuable Professional (MVP) title for 5 years in a row.

Google Cloud Champion

Google Cloud Champion

Google awarded us the Champion Innovator title recognizing our technical skill and expertise.

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