A Chrome extension that shows where your cold emails actually land before you send another campaign
"The sent email can be detected as 'spam email' very easily." You check your tracker and half your sequence never opened. You test with a colleague and confirm it: you're in spam.
| People who complained | 59 | newest August 2026 · Mailtrack® – Email Tracker for Gmail, Multi Email Forward by cloudHQ |
|---|---|---|
| Google searches a month | not measured | |
| Paid orders on Fiverr | 234+ | median order $23–$214 |
| Apps already selling a fix | not checked |
▶ Watch the 50-second breakdownThe same idea, with the real data on screen
The idea
A one-click diagnostic that sends a clean test email to real inboxes and reports your true placement, then flags the misconfigurations hurting your deliverability.
- Click "Run Inbox Test." The extension sends a single plain-text email to a network of seed inboxes.
- The dashboard shows you exactly where it landed: inbox, spam, or nowhere.
- A "Sender Health" checklist scans your Gmail setup and flags common issues you can fix.
Who it’s for
Sales or outreach lead at a 2–10 person B2B company who sends 100+ personalized cold emails per week through a Gmail Chrome extension
What they do today: Manually stripping tracked links, switching between extensions hoping one evades filters, or moving to a dedicated cold-email platform they cannot afford
Why now
- The newest complaint about Gmail mail-merge extensions landing in spam is from August 2026.
- Chrome Web Store reviews for top Gmail extensions are now dominated by deliverability complaints.
- Fiverr sellers have completed 234 paid orders for deliverability audits and spam fixes, at a median of $29.
What people say
“I subscribed GMASS for my Research Journal however even after taking paid subscription, I am not able to send the mass mails. It says you have reached the gmail limits of 500 emails. If I have to send only 500 mails as…”
“What a scam program. In free licensce, you can send only one e-mail. If you want to send one more, you have to acces premium, without premium u cant send any emails.”
How it makes money
Charge $29/mo for the diagnostic dashboard. This matches the median price people already pay on Fiverr for one-off deliverability fixes. Payment for a recurring software tool is not yet proven.
Your first 10 customers
Step 1: Find the 10 most recent 1-to-3-star reviews on the GMass and GoEmailTracker Chrome Web Store pages that mention spam.
Step 2: Reply to each review and offer a free manual inbox test in exchange for feedback.
Step 3: Run the test manually: have them BCC a unique address, then email them a simple placement report.
0 to a test this week
Step 1: Set up a Mailgun account and create a list of 5–10 seed inboxes you control.
Step 2: Build a bare Chrome extension that sends one plain-text test email via the Gmail API.
Step 3: Manually check the seed inboxes and email the user a simple "inbox vs. spam" report.
What could kill it
Sales leads may not pay a subscription for a tool that only diagnoses problems without fixing them. The paid demand on Fiverr is for full audits and fixes, not just reports.
Get the full report, free
- A 4-step validation plan, each step with the result that tells you to stop
- 3 core features, each tied to the complaint it answers
- 5 more real complaints, each linked to its source
- The competitors already selling a fix and what they miss
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