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New Gmail Mail Merge Feature: Manually Import or Remove Unsubscribe Addresses

If you’ve been using GMass for your mail merge campaigns in Gmail, you can now easily add email addresses to your account’s Unsubscribe List.

As a reminder, any email addresses on your Unsubscribe List will be suppressed from your GMass campaigns — that means they will be eliminated from any campaign you send with the GMass button. Additionally, if you’re a G Suite user and you’ve enabled Global Unsubscribes, you can also use this feature to suppress email addresses across all other GMass accounts of the same domain.

To add email addresses to your Unsubscribe List:

1. Launch a regular Gmail Compose Window.

2. Set the To field to unsubscribe@gmass.co.

3. Type anything you like in the Subject Line, so long as it’s not blank.

4. Paste in a list of email addresses to unsubscribe as the body of the message, with each email address on one line.

5. Click the GMass main button.

Important: Be sure to hit the red GMass button, and not the regular Gmail Send button. Hitting the regular Send button won’t accomplish anything.

You can use this method to unsubscribe thousands of email addresses at once. For example, if you’re switching from a traditional email service provider like MailChimp over to GMass, you may want to take all of your unsubscribe addresses from MailChimp and import them into GMass.

To remove email addresses from your Unsubscribe List:

If you’ve accidentally unsubscribed yourself, or if you a particular email address has unsubscribed but now wants back on your email list, you can remove an address from your Unsubscribe List. Follow the same procedure as above, but set the To field to resubscribe@gmass.co.

Need to unsubscribe an entire domain?

You can also unsubscribe an entire domain. Follow the same instructions as above, but place domains on each line rather than email addresses. You can also have a combination of email addresses and domains that you unsubscribe all in one shot. More information on unsubscribing domains.

Final Thoughts:

If you’re unfamiliar with the unsubscribe feature of GMass, learn how to add an Unsubscribe Link to your mail merge campaigns in Gmail.

  1. I assume that emails that are unsubscribed will also stop getting auto-followup messages that are already scheduled?

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  4. Is this feature for individuals who email back directly vs. hitting the “unsubscribe” button in our email that went out? We set up a large campaign and have had about 50 people thus far email back with “unsubscribe.”

    Should I email that list of 50 to unsubscribe@gmass.co?

    On top of that, do you recommend I delete these unsubscribers from our initial google sheet we have linked to the campaign since they don’t want contact from us anymore?


    1. Hi Noel,

      If they did not click your unsubscribe link then yes, you would need to manually import them to your list. If a recipient unsubscribes or if you manually imported them to your unsubscribe list, then you won’t need to manually clean up your Google Sheet since all future campaigns will be suppressed from sending to any of those addresses in your unsubscribe list.

    1. Hi Neeraj,

      You may download a list of your unsubscribers from your GMass Reports. You can do so by going to your GMass Reports -> [CAMPAIGNS] label and opening your most recent campaign. On the line item Unsubscribes, you will see 2 links: one for unsubscribers just for that campaign and the other is a list of all unsubscribes across all campaigns from your account. To learn more please see https://www.gmass.co/blog/gmail-mail-merge-reports-and-analytics/

  5. If I label unsubscribes to “GMass Reports/Unsubscribes” will that unsubscribe them from future mailings?

  6. If the recipient replies with a manual “unsubscribe” and there is an auto follow up message for anyone who replies, how do we get around this?

    1. You would need to manually unsubscribe that recipient right when you receive their request.

  7. We use SendGrid, and they evidently suppress bounces and blocked addresses without notifying GMass. I am assuming that’s why I don’t see any Bounces folder under my GMass folder in Gmail.

    However, I need to make sure that drafts for those addresses do not get created in my Gmail outbox for pending follow-ups.

    Will adding those addresses to my unsubscribe list suffice?


    1. Hi Gene,

      Yes, you can add those bounced addresses in your unsubscribe list to suppress them from being sent emails in future campaigns. Also, please make sure that Bounce Notifications are on in your SendGrid account settings. Set them to go to the From Address. This will allow GMass to process your bounces, just like normal without the need for you to manually maintain the bounced addresses in your unsubscribes list.

  8. Hi, I tried using this method but after hitting the GMASS button, it says 0 emails saved to unsubscribe list. Is that right?

  9. Hi, on my unsubscribe tab there is a list of unsubscribes. Does this automatically suppress these emails when I send out a new campaign?

  10. Hi there,

    How do I get just the email addresses of the ones who unsubscribed without clicking email notifications one by one? Is there a way to export all those email addresses? I need to delete those email addresses from our HubSpot mailing list.


  11. Hi if I have a running campaign that is sending emails daily, as I add to my daily spread sheets and i keep daily adding people manually to the unsubscribe. Those people wont be sent emails right? Or do I need then re-do the campaign to make way for the new unsubscribed on my list….

  12. Hi, I have 1 person that unsubscribed by clicking the button in an email. I haven’t removed that person from my Gmass google spreadsheet and continue to link the same spreadsheet when composing another campaign. I’m designing another campaign and when I looked at the individual email addresses the unsubscriber was in the list of recipients! Please advise so we don’t accidentally send emails to unsubscribers.
    Thank you

  13. If you have auto follow ups for a campaign and someone responds aren’t they automatically removed from future auto follow ups? Isn’t that what the whole feature “if no reply in x days” means? If so why is there a need for an unsubscribe list?

  14. Will GMass, once linked to my email account, filter out Unsubscribed email addresses from previous Mail Merge Campaigns sent from Google Sheets as a “Mail Merge Attachment”? My guess is no, but since I already pay for Mail Merge Annually, I’m looking for an easy way to scrub Unsubscribed emails automatically from future Mail Merge as Attachment campaigns. Any ideas??? Thanks!

    1. Hi Dallas,

      Unfortunately, no, however, if you can get a list of your unsubscribers from “Mail Marge Attachments”, you can mass unsubscribe them through the instructions outlined in the article above.

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