Upcoming Changes to GMass Pricing (Jan 2026)
GMass turned 10 this year, and in that time our users collectively sent more than 9 billion emails. That number still blows my mind and it’s a responsibility…
GMass Blog
Email, Gmail, and GMass — explained.
Practical guides, product updates, deliverability research, and experiments from the team building GMass.
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Open Tracking Hardening: Stop False Opens When Viewing Sent Emails
Our goal at GMass is to have the most accurate open rates in the industry. We’re pretty sure we do — but there’s always room to get even…
AI Template Builder: Create HTML Email Layouts Directly in Gmail
Want to send a beautifully-designed email in Gmail like a newsletter, eCommerce promo, or other marketing message? Gmail has always made it really hard. Forget a drag-and-drop builder; they don’t…
How to Send a GMass Campaign From Your Boss’s Account
GMass works inside your Gmail account. But what happens if you want to send a GMass campaign from someone else’s account? Like, for instance, your boss? There are actually two…
How GMass’s “From Address” Replacement System Works
GMass’s From address replacement system is our way of making sure you can send high-volume campaigns through GMass using an SMTP service without failing DMARC authentication. If there are…
Hit Gmail’s Limits? Get Instant Approval to Keep Sending Thru GMass’s Server
You can now send GIANT email campaigns with zero technical setup or complexity, straight from your Gmail account. No one else but GMass makes this possible. Here’s how… Instant Approvals…
How to Connect a Google Sheet to GMass (Full Guide)
Odds are, you’re using GMass to run a Google Sheets mail merge — where you connect your Google Sheet of contacts to a campaign and build your campaign from…
How to Send Personalized Bulk Sales Quotes Fast Using Mail Merge
There’s endless advice out there on how to send cold email — but a lot less advice on what to do when your campaign actually works and now you…
Google Forms Mail Merge: How to Automate Emails to Responders
Want to run a Google Forms mail merge — where you automatically send an email to everyone who responds? Good news: That’s not just doable… I’m gonna go ahead…
How to Save Hours with an Invoice Mail Merge in Google Sheets
If you’re sending invoices one at a time — and not doing invoice mail merge — you’re wasting hours every month for no reason. And it’s ok. Once upon a…
6 Tips to Format Your Google Sheet for Smooth Mail Merging
The way you format your Google Sheet for a mail merge campaign can make a serious difference between a smooth experience and a frustrating one. I work personally with…
Google Docs vs Microsoft Word Mail Merge: Which Is Better in 2026?
Before we dive into a Google Docs vs Microsoft Word mail merge showdown, we need to handle some business up front: We need to make sure that’s actually the…