To use GMass, install its Chrome extension, connect your Gmail account, then compose an email as usual and press the GMass button instead of Gmail's Send button. You can add recipients from a Google Sheet for personalisation, set auto follow-ups in the settings box, and read results under the GMass Reports label.
GMass works inside Gmail. The vendor says it sends newsletters, announcements, cold email campaigns and transactional email from there, rather than from a separate app.
Once installed, it adds buttons to the Gmail screen, and that's where every step below happens. This guide follows the vendor's FAQ and feature pages, from install to reading your reports.
Before you install GMass
The vendor's FAQ lists two requirements: a Gmail or G Suite account, and the Chrome browser.
It's also worth knowing where your emails go out from. By default, GMass sends through Gmail's own servers from your account, and every message appears in your Sent Mail folder.
What changes in Gmail once it's installed
| Where you'll see it | What it does, per the vendor's pages |
|---|---|
| Beside the search field | Build Email List, Google Sheets Connect and Follow-up Campaigns buttons |
| Next to Gmail's Send button | A main GMass button and a settings box |
| GMass settings box | Options such as auto follow-ups, and merge fields from a connected sheet |
| Test options | A Just create Drafts option and a Send Test Email button |
| Gmail labels | A GMass Reports label for opens, clicks and unsubscribes |
| Your email features | Anything Gmail supports, including attachments and inline images, can be assumed to work |
Sending your first GMass campaign
Here's the route from a fresh install to a sent campaign, based on GMass's FAQ and feature pages. The FAQ's own simple test uses just a few addresses in the To field.
- Install and connect. Add the GMass Chrome extension and connect your Gmail account when it asks.
- Choose your recipients. Type a few addresses into To, use the Build Email List button beside the search field, or connect a Google Sheet.
- Write the email. Click Compose and write your subject and message. If you've connected a sheet, add merge fields for personalisation.
- Set your options. Open the GMass settings box beside the Send button to choose extras such as auto follow-ups.
- Test before you send. Use Send Test Email, or the Just create Drafts option, which lets you check personalisation without sending anything.
- Run the campaign. Press the GMass button, not Gmail's normal Send button.
- Read the results. Open the GMass Reports label in Gmail to see opens, clicks and unsubscribes.
Personalising with a Google Sheet
The vendor's Google Sheets page describes the setup. You connect a sheet by clicking one icon in Gmail and choosing the sheet from a dropdown menu.
Once it's connected, every column in that sheet becomes a mail merge field. You can insert one from the GMass settings box, or by typing a left curly bracket in your message. So each column heading in your sheet is a field you can place in the email.
Before a real send, run Just create Drafts so you can check the personalisation in the drafts it creates without anything going out.
Setting up follow-ups
According to the FAQ, auto follow-ups send automatically in the same conversation to recipients who haven't replied. The vendor's follow-up page lists these options for the stages.
- Stop on a response: stages can keep going until a contact replies, clicks or opens.
- Drip regardless: or they can run as a drip, whatever the recipient does.
- Skip weekends: stages can be scheduled to skip weekends.
You choose auto follow-ups in the GMass settings box beside the Send button, before you run the campaign.
Gmail limits, big lists and privacy
GMass doesn't remove Gmail's own rules. The vendor's FAQ says Gmail's sending limits still apply, and for a large campaign GMass can spread sending over several days or send through an external SMTP server instead.
The same FAQ says GMass isn't designed for campaigns to millions of addresses.
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On privacy, the FAQ says GMass doesn't read your email and stores only recipient addresses and subject lines to provide reports. And if you're wondering why there's no Reports label yet, it only shows once at least one open, click or unsubscribe has happened.
Related guides if you're choosing a setup
If you're still deciding whether a Gmail add-on is right for outreach, my roundup of cold email software compares GMass-style tools with standalone platforms. Teams who want contact records alongside their campaigns might look at the options in this guide to CRMs for Gmail. And for sorting the replies, see how to organise Gmail with labels and filters.
GMass in short
You need Chrome and a Gmail or G Suite account. Install the extension, connect Gmail, pick recipients by typing them, using Build Email List or connecting a Google Sheet, and write the email in Compose. Test with Send Test Email or Just create Drafts, set any follow-ups in the settings box, then press the GMass button rather than Send. Gmail's own sending limits still apply. The vendor offers a trial, with plan details on its own site.
Frequently asked questions
Do I need Chrome to use GMass?
Yes. The vendor's FAQ says you need a Gmail or G Suite account and the Chrome browser.
Where do GMass emails send from?
By default they go out through Gmail's own servers from your account, and they appear in your Sent Mail folder.
How do I test personalisation in GMass?
Use the Just create Drafts option to check personalisation without sending, or the Send Test Email button.
Why can't I see the GMass Reports label?
It only appears once at least one open, click or unsubscribe has happened.
Can GMass send attachments?
The FAQ says any feature Gmail supports in an email, including attachments and inline images, can be assumed to work in GMass too.
Does GMass read my emails?
The vendor's FAQ says it doesn't read your email and stores only recipient addresses and subject lines to provide reports.
Do Gmail sending limits still apply?
Yes. GMass says Gmail's own limits still apply, and it can spread a large campaign over several days or send through an external SMTP server.
