Unlimited Gmail Mass Email Sender Extension - GMass Alternative

Hey folks in the outreach/marketing section,

I've built a simple, self-developed Chrome extension as a free alternative to GMass for scaling Gmail campaigns. It integrates directly into Gmail: paste your recipient list (one email per line), set random min/max delays (e.g., 2-6 seconds to mimic human sending), then hit "Prepare & Send".

Here's a screenshot of the actual popup interface:


Core perks:

• No credit system or artificial limits from the extension itself
• Built-in random delays to help avoid spam flags
• Easy to use

I also have a private method for creating fresh Gmail accounts at scale (bypassing quick phone verifs ) — great for safe rotation.

For safety and long-term deliverability, I personally cap at ~180 emails/day per account (even though Gmail's official free limit is around 500/day).

It's basic but effective mass sending right now, and since I coded it myself, I can expand it easily.

What features do you think I should add next? (e.g., personalization with merge tags, A/B testing, open/click tracking?)What would this tool realistically be worth if offered with lifetime access?How much do you think I could earn from it?

Also curious about your 2026 setups:

• How many emails/day do you safely send per warmed Gmail account?
• What's your rotation strategy and warmup process?

Just looking for honest feedback to improve it!

Suggestions welcome!

This looks pretty cool, good work

Proxy Cake said:

This looks pretty cool, good work

Click to expand...

Thank you broo

To be able to send mass cold email campaigns, you'll need to support multi accounting by creating a unique browser profile for each account, support accounts rotation, proxies, generate unique browser fingerprints for each accounts, use spintax to make your emails look different to Google.

what i would add :
1) ability to use a smtp (like gmass) to be able to use smailgun, amazon etc
2) ability to load templates
3) follow up messages

If you can at least 1, i would buy it if cheaper than gmass (i cancelled as it is getting more expensive)

looks like a good project.