Video interview with GMass founder, Ajay Goel, on Growth Hacker TV
Check out this just-released Growth Hacker TV video interview with Ajay Goel, the creator of GMass. In this video, Ajay discusses the meteoric rise of GMass and the…
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Email, Gmail, and GMass — explained.
Practical guides, product updates, deliverability research, and experiments from the team building GMass.
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How to stop GMass from sending emails from your Gmail account
There are lots of reasons why you may need to stop GMass from sending emails from your Gmail account: GMass may have started sending a multi-day campaign, but…
Sending limit of free accounts will change to 50 emails/day
Note: GMass no longer offers free accounts due to unsustainable amounts of abuse and resource drain. A free trial is still available for all new GMass users. Starting…
What Is a Custom Tracking Domain and How Does It Improve Email Deliverability?
Setting a custom tracking domain on your outreach emails: improves deliverability, preventing email blocking and spam folder issues improves the branding of your links increases your click-through rate…
How many emails can you really send with GMass and Gmail? [2026]
Gmail officially claims that with a regular Gmail account you can send 500 emails/day and with a G Suite account you can send 2,000 emails/day. In fact, I’ve…
Spammers, GMass, and why your legitimate emails are ending up in Spam or being flagged as scam
We’ve had several users in the last few days report that emails they are sending with GMass to their own Gmail addresses are ending up in the Spam…
GMass Pricing Frequently Asked Questions (FAQ)
First, here’s the GMass Pricing page where you can subscribe. Free Trial versus Paid Q: Do I have to upgrade to a paid account? Can I just keep using…
Political Email Marketing with GMass
Personal, Direct Messages Sway Voters 2016 is shaping up to be one of the most contentious and important election years in history. Local, state, and federal races are…
Yahoo bouncing emails sent by select GMass users
Several users have reported that in the last few days, sending to yahoo.com email addresses, and email addresses hosted by Yahoo has resulted in a bounce because Yahoo…
Create Rich Content for an Automatic Follow-Up Email Sequence
The automatic follow-up email feature allows you set a an automatic timed sequence of emails to be sent to your recipients until they reply or open or click. Sometimes…
Send a mail merge campaign to just selected rows of a spreadsheet
When connecting to a Google Sheets spreadsheet to send a mail merge campaign, you can now specify filter criteria to pull only certain email addresses that match the…
Complete Guide to Mail Merge Personalization in Gmail [Updated 2026]
Mail merge personalization turns one email template into hundreds of customized individual messages. Instead of sending identical text to everyone, you put placeholders in your template (like {FirstName}…