Démarrage rapide
This quickstart guide covers every GMass feature inside Gmail:
- Commencer — Install the GMass Chrome extension and connect your Gmail account
- Comment utiliser l'automatisation des e-mails — Send mass email campaigns and triggered emails on autopilot
- How to Use Email Analyzer — Score every cold email before you hit send
- How to Use Email List Builder — Build clean email lists of new contacts inside Gmail
- How to Use Email Link Checker — Check tracking links so no broken URL reaches your leads
- How to Use Merge with Google Sheets — Run mail merge campaigns straight from Google Sheets
- Comment utiliser les rapports et les analyses — Read GMass reports on opens, click tracking, and replies
- Comment utiliser un test de délivrabilité — Test inbox placement against common spam filters
- How to Use Automated Follow-up Emails — Trigger automatic follow up emails until a lead replies
- How to Use Mass Scheduling — Schedule mass emails for the exact moment leads are active
Temps nécessaire : 5 minutes par fonctionnalité
Vous trouverez également dans ce guide : Conseils de pro | Erreurs courantes | Dépannage | Tarification | Alternatives
Use this table of contents to jump straight to the part you need.
Pourquoi faire confiance à ce guide ?
I’ve used GMass for over two years and tested every feature covered here.
This tutorial comes from real hands-on outreach campaigns, not vendor screenshots.
I have run mail merge campaigns to thousands of new contacts with it.
So every tip below was earned by sending real email campaigns, not theory.
Learning how to use GMass starts with one idea.
It lives inside Gmail, not in a separate app.
GMass works to transform Gmail into a full mass email and mail merge engine.
It is a mail merge platform and email marketing tool built as a Gmail Chrome extension.
It packs all the core features of an outreach suite into a regular gmail account.
Most gmass users only scratch the surface of what the tool can do.
Courriel froid lives or dies on deliverability and timing.
Email marketing rewards personalization and steady follow up.
GMass was built to handle both from one familiar place.
Ce guide vous montre comment utiliser chaque fonctionnalité principale, étape par étape.
You get screenshots and pro tips for each one.
GMass Tutorial
This complete GMass tutorial walks you through every feature step by step.
You move from first setup to advanced reply management and behavior based campaigns.
By the end, you will know how to send campaigns that actually reach the inbox.
GMass vs Native Gmail Mail Merge
Gmail now has a basic mail merge built in.
Google added native mail merge to Gmail in 2023.
It handles simple sends to a small list of email addresses.
But it caps low and offers no follow ups or reportage.
GMass goes far beyond that.
It adds auto follow ups, GMass reports, and email verification.
It can send over 10,000 emails daily, not a few hundred.
So native mail merge suits one-off notes, while GMass runs real campaigns.
GMass
Launch email campaigns without leaving your Gmail inbox. GMass lets you send mass email, run mail merge from Google Sheets, and trigger automatic follow ups until a lead replies. Try it free — no credit card required.
Getting Started with GMass
Avant d'utiliser toute fonctionnalité, veuillez effectuer cette configuration unique.
Cela prend environ 3 minutes du début à la fin.
It works with any regular gmail account or a google workspace inbox.
GMass installs as a gmail chrome extension.
So there is no separate gmail app to download or sync.
Passons maintenant en revue chaque étape.
Step 1: Install the GMass Chrome Extension
Open Chrome and go to the GMass website.
Click the install button to add the GMass Chrome extension.
The chrome extension drops a small toolbar into Gmail.
Grant access so the gmail chrome extension can connect to your gmail account.
✓ Point de contrôle: A small red GMass button appears next to the Gmail search bar.
Step 2: Connect Your Gmail Account
Open Gmail and refresh the page once.
Log in with the account you want to send campaigns from.
Approve the permissions GMass needs to send emails for you.
This works for one regular gmail account or multiple accounts at once.
Teams on google workspace connect the same way.
Here’s what the connected dashboard looks like:
✓ Point de contrôle: You should see the GMass settings panel inside Gmail.
Step 3: Send a Test Message
Open the compose window and write a short note to yourself.
Send one or two test messages to confirm routing works.
Check that the gmail inbox receives each test message.
New gmass users should always verify this before any real send.
A test catches broken links or merge errors tôt.
Step 4: Connect a List or Google Sheet
Decide how you will load contacts for your first campaign.
You can paste email addresses straight into the Gmail To field.
Or connect a Google Sheet for a full mail merge.
A sheet lets you pull merge fields like names and companies.
This step is optional, but it unlocks personalized mass email campaigns.
✅ Terminé : You’re ready to launch your first campaign with any feature below.
How to Use GMass Email Automation
E-mail Automation lets you set up behavior based campaigns and triggered emails that run on autopilot.
GMass turns Gmail into an engine for triggered emails.
You set rules once, and the tool sends on its own.
This is how power users keep outreach campaigns running while they sleep.
When to use Email Automation
Reach for automation when you send the same outreach again and again.
It shines for sales teams chasing dozens of cold leads at once.
It also helps recruiters keep candidates warm without manual nudges.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Open the GMass Settings
Click the GMass button inside the compose window to open settings.
This is where every automation rule lives.
You control sends, follow ups, and timing from one panel.
Étape 2 : Construisez votre séquence
Add automatic follow ups that send until a lead replies.
Each follow up email pauses the moment GMass detects a reply.
You can stack three or four follow ups in a single sequence.
These triggered emails fire only for contacts who stay silent.
Voici à quoi cela ressemble :
✓ Point de contrôle: A green confirmation shows your automated follow up emails are queued.
Step 3: Activate the Campaign
Turn on the sequence so your outreach campaigns send themselves.
GMass then handles every send and pause for you.
A quick real-world example
Say you email 200 prospects on Monday.
GMass sends a follow up email on Thursday to everyone who stayed quiet.
Anyone who replies is dropped from the sequence automatically.
You wake up to a clean inbox of warm responses, not a spreadsheet of to-dos.
Why this matters
Manual follow ups are the first task busy senders drop.
Automation removes that risk entirely.
It also keeps your email campaigns consistent across every lead.
Tips for Email Automation
Map your whole sequence before you turn it on.
Keep each triggered email short and useful.
Test the first send to yourself to catch errors early.
✅ Résultat : Your email campaigns now run as automatic follow ups without manual work.
💡 Conseil de pro : Stagger sends across multiple accounts to keep each gmail account inside its sending limits.
En résumé : Email Automation is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Email Analyzer
Email Analyzer lets you score every cold email for spam filters before you hit send.
Deliverability is decided before you ever click send.
The email analyzer scores your draft against spam filters.
It tells you what will hurt placement de la boîte de réception and why.
When to use Email Analyzer
Run the email analyzer on every new template before launch.
It is most useful for cold email where deliverability is fragile.
Use it any time your open rates suddenly drop.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Paste Your Draft
Drop your cold outreach copy into the email analyzer.
It scans subject line, body, and links at once.
Step 2: Run the Spam Check
GMass flags words and links that trip spam filters.
The built-in spam solver suggests fixes for better inbox placement.
Each flag explains the risk in plain language.
Voici à quoi cela ressemble :
✓ Point de contrôle: A clean score means your mass email is ready to send.
Étape 3 : Appliquer les correctifs
Edit your subject line and body, then re-test.
Repeat until the score is clean.
A quick real-world example
Imaginer a subject line full of cash symbols and urgency words.
The analyzer flags it as a spam risk in seconds.
You swap in a plain, human subject line.
Your next mass email lands in the inbox instead of the spam folder.
Why this matters
A single spam-trigger word can sink a whole campaign.
Scoring first protects your domain reputation.
It also lifts the odds your cold email lands in the inbox.
Tips for Email Analyzer
Re-run the analyzer after every edit, not just once.
Treat a high score as a floor, not a finish line.
Pair it with the deliverability test for the full picture.
✅ Résultat : Your cold email scores high for inbox placement, not the spam folder.
💡 Conseil de pro : Keep one version in plain texte — plain text often beats heavy HTML for cold outreach.
En résumé : Email Analyzer is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Email List Builder
Email List Constructeur lets you build clean email lists of new contacts straight from your gmail inbox.
Good outreach starts with a clean list.
GMass builds one straight from your gmail inbox.
No exports and no messy spreadsheets are needed.
When to use Email List Builder
Build a list whenever you want to re-engage past conversations.
It is perfect for turning event replies into a clean segment.
Use it before any campaign that targets warm gmail inbox contacts.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Search Your Inbox
Use Gmail search to find threads with the contacts you want.
Any past conversation becomes a source of new contacts.
Step 2: Build the List
GMass pulls every email address into a fresh list automatically.
It de-duplicates email addresses so no contact is mailed twice.
Bad email ids are flagged before they cause bounces.
Voici à quoi cela ressemble :
✓ Point de contrôle: Your new contacts appear as a ready-to-mail list.
Step 3: Save the Segment
Name the list so you can send campaigns to it later.
You can reuse the same segment across many campaigns.
A quick real-world example
You hosted a webinar and dozens of people emailed questions.
GMass scrapes every email address from those threads.
It removes duplicates and dead email ids on the spot.
Now you have a ready list of new contacts to follow up with.
Why this matters
Manual list building wastes hours every week.
Pulling contacts from Gmail is instant.
It also keeps your email addresses fresh and accurate.
Tips for Email List Builder
Search broad first, then trim the list down.
Verify email addresses right after you build the list.
Label segments clearly so future campaigns stay organized.
✅ Résultat : You have a clean list of email addresses without touching a CSV file.
💡 Conseil de pro : Combine this with email address verification to remove dead email ids before sending.
En résumé : Email List Builder is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Email Link Checker
Email Link Checker lets you confirm every tracking link works before a campaign goes out.
One broken link can ruin a great campaign.
The email link checker tests every URL before you send.
It guards your click tracking and your reputation at once.
When to use Email Link Checker
Check links before every send that includes a CTA button.
It matters most for campaigns tied to a sale or deadline.
Use it any time you set up custom tracking domains.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Add Your Links
Insert the tracking links and CTAs into your draft.
Every button and hyperlink gets checked.
Step 2: Scan for Errors
The email link checker tests every URL for broken redirects.
Click tracking only works when each link resolves cleanly.
Broken links are flagged with the exact error.
Voici à quoi cela ressemble :
✓ Point de contrôle: Every link returns a healthy status.
Step 3: Fix Broken URLs
Replace any flagged link, then re-scan.
A clean scan means every tracking link is live.
A quick real-world example
You paste a landing page link that has a typo.
The email link checker catches the broken redirect at once.
You fix the URL before a single lead ever clicks it.
Your click tracking stays accurate and your reputation stays clean.
Why this matters
Dead links cost clicks and trust.
Checking first keeps your données précis.
It also makes your GMass reports reliable.
Tips for Email Link Checker
Check links the moment you finish writing.
Replace shorteners with custom tracking domains where you can.
Re-scan after any last-minute copy change.
✅ Résultat : No broken tracking links reach your leads, so click tracking stays accurate.
💡 Conseil de pro : Set up custom tracking domains so your tracking links match your own brand.
En résumé : Email Link Checker is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Merge with Google Sheets
Merge with Google Sheets lets you run mail merge campaigns using merge fields pulled from google sheets.
This is the heart of GMass.
It connects email and mail merge to a live Google Sheet.
Every row becomes its own personalized mass email.
When to use Merge with Google Sheets
Use mail merge whenever personalization will lift replies.
It is built for cold outreach at real scale.
Reach for it any time a generic blast feels too impersonal.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Connect a Sheet
Click the Google Sheets icon in the GMass compose window.
GMass reads your columns as merge fields immédiatement.
Step 2: Map Merge Fields
Add merge tags like {FirstName} to personalize each mass email.
GMass replaces the need for CSV files with live google sheets data.
You can even add a column for personalized images.
Mail merge can attach unique files for each recipient too.
Voici à quoi cela ressemble :
✓ Point de contrôle: Each recipient sees their own personalized email and details.
Step 3: Send the Merge
Launch the mail merge campaign to every row at once.
Each contact receives a message written just for them.
A quick real-world example
Your Google Sheet has columns for name, company, and a custom line.
GMass pulls each row into its own personalized email.
One contact sees their first name and a note about their company.
The next sees something completely different, all from one send.
Why this matters
Generic blasts get ignored.
Personalized mail merge campaigns earn replies.
Google Sheets keeps your data live and easy to edit.
Tips for Merge with Google Sheets
Keep one clean header row in your sheet.
Add a fallback for empty cells so no field looks broken.
Preview a few rows before the full mail merge send.
✅ Résultat : One mail merge tool sends thousands of unique mass email campaigns in seconds.
💡 Conseil de pro : Add a column for personalized images so each contact gets a tailored visual.
En résumé : Merge with Google Sheets is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Reporting & Analytics
Rapports et analyses lets you track opens, click tracking, and reply management in real time.
Sending is only half the job.
GMass reports show you exactly what happened next.
You see opens, clicks, and replies inside Gmail.
When to use Reporting & Analytics
Open GMass reports after every campaign without exception.
They matter most when you test new subject lines.
Use them to decide which message deserves a bigger send.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Open GMass Reports
Find the campaign label in the left Gmail menu.
Every campaign gets its own report automatically.
Step 2: Read the Metrics
GMass reports show opens, clicks, replies, and bounces.
Reply management groups responses so no warm lead slips away.
Click tracking shows which links earned the most interest.
Voici à quoi cela ressemble :
✓ Point de contrôle: A full dashboard of opens and clicks loads inside Gmail.
Step 3: Export the Data
Download results to compare email campaigns over time.
Trends help you sharpen the next send.
A quick real-world example
You run two subject lines on a small batch first.
GMass reports show one earned double the opens.
You send the winner to the rest of your list.
Reply management then keeps every response neatly grouped.
Why this matters
You cannot improve what you cannot measure.
GMass reports turn raw sends into clear lessons.
Reply management makes sure hot leads get answered fast.
Tips for Reporting & Analytics
Compare campaigns weekly to spot real trends.
Watch reply rate, not just opens, for cold outreach.
Export data so you can study winners over time.
✅ Résultat : You know exactly which mass email campaigns earned replies.
💡 Conseil de pro : Run A/B testing on your subject line, then let GMass reports pick the winner.
En résumé : Reporting & Analytics is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Deliverability Test
Test de délivrabilité lets you see where your mass email lands across the major email providers.
Landing in the inbox is everything for cold email.
The deliverability test shows where your mail actually lands.
It checks placement across major providers before you scale.
When to use Deliverability Test
Test deliverability before scaling any cold email campaign.
It is vital after you change domains or warm up a new inbox.
Use it whenever inbox placement feels uncertain.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Start the Test
Open the deliverability test from GMass settings.
It runs from the same panel you compose in.
Step 2: Send Seed Emails
GMass sends test messages to seed inboxes you do not control.
Results show inbox placement versus the spam folder for each provider.
You see Gmail, Outlook, and Yahoo placement side by side.
Voici à quoi cela ressemble :
✓ Point de contrôle: A placement map shows inbox versus spam for every provider.
Step 3: Adjust and Retest
Fix content or warm up, then run the test again.
Repeat until placement looks strong everywhere.
A quick real-world example
You plan to send 5,000 emails next week.
First you run a deliverability test on a small seed list.
Results show Outlook placement is weak.
You fix content and authentication before risking the full send.
Why this matters
Blind sending burns your domain reputation.
Testing first protects every future campaign.
It tells you when content, not volume, is the problem.
Tips for Deliverability Test
Test a small seed batch before any big send.
Fix content issues before blaming volume.
Retest after every domain or authentication change.
✅ Résultat : You confirm strong inbox placement before scaling outreach campaigns.
💡 Conseil de pro : GMass does not handle domain warm-up, so pair it with a warm-up service for cold email.
En résumé : Deliverability Test is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Automated Follow-up Emails
Automated Follow-up Emails lets you send automatic follow up emails until a lead finally replies.
Most replies never come from the first email.
GMass sends automatic follow up emails for you.
Each one stops the moment a lead finally replies.
When to use Automated Follow-up Emails
Add follow ups to every cold outreach campaign you run.
They matter most for busy prospects who skim and forget.
Use them whenever a single email is unlikely to land.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Write the Sequence
Compose your first email plus two or three follow ups.
Vary the angle of each follow up email slightly.
Step 2: Set the Triggers
Choose to stop follow ups the moment a reply arrives.
These triggered emails fire only for contacts who stay silent.
You decide the gap between each send.
Voici à quoi cela ressemble :
✓ Point de contrôle: Your follow ups appear scheduled under the campaign.
Step 3: Launch It
Send the campaign and let GMass handle every follow up email.
GMass tracks replies and pauses the right threads.
A quick real-world example
You send one pas and hear nothing for three days.
GMass sends a short, polite nudge automatically.
A few leads reply to that second touch alone.
The sequence stops for them while it continues for the rest.
Why this matters
Following up by hand is slow and easy to forget.
Auto follow ups never miss a beat.
They are the single biggest lever on reply rates.
Tips for Automated Follow-up Emails
Space follow ups two to three days apart.
Change the angle of each follow up email.
Always enable stop-on-reply so happy leads stop hearing from you.
✅ Résultat : GMass automatically chases cold leads so you never forget a follow up.
💡 Conseil de pro : Three to four auto follow ups usually lift reply rates on cold outreach the most.
En résumé : Automated Follow-up Emails is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
How to Use GMass Mass Scheduling
Mass Scheduling lets you schedule mass emails for the exact time your leads are most active.
Timing changes how many people open your mail.
Mass scheduling lets you pick the perfect moment.
You can queue campaigns days or weeks ahead.
When to use Mass Scheduling
Schedule sends whenever your leads live in another time zone.
It is ideal for queuing a week of campaigns in one sitting.
Use it to spread volume and dodge daily sending limits.
Voici comment l'utiliser étape par étape.
Maintenant, décomposons chaque étape.
Step 1: Compose Your Campaign
Build the email and attach your list or Google Sheet.
Everything is set from the normal compose window.
Step 2: Pick a Send Time
Use campaign scheduling to set the perfect delivery window.
You can schedule emails days or weeks ahead from one screen.
Match the time zone of your leads for best results.
Voici à quoi cela ressemble :
✓ Point de contrôle: A timer shows when your scheduled mass emails will go out.
Step 3: Queue the Send
Confirm, and GMass sends campaigns automatically at that moment.
No need to be online when it fires.
A quick real-world example
Your prospects open mail at 9am their local time.
You schedule the campaign the night before.
GMass fires it at exactly the right moment.
You see higher opens without setting an early alarm.
Why this matters
Sending at 2am kills your open rate.
Scheduling puts mail in front of awake readers.
It also helps you drip volume to dodge sending limits.
Tips for Mass Scheduling
Match the send time to your leads’ time zone.
Stagger large lists across several days.
Queue a full week at once to save time.
✅ Résultat : Your mass email campaigns land when opens and clicks peak.
💡 Conseil de pro : Schedule send-outs in batches to break Gmail’s sending limits safely over a day.
En résumé : Mass Scheduling is one of the features that makes GMass worth using daily.
Set it up once and it keeps paying off across every campaign.
GMass Pro Tips and Shortcuts
After testing GMass for over two years, here are my best tips.
Each one helps you get more replies from every send.
Raccourcis clavier
| Action | Raccourci |
|---|---|
| Open the GMass button | Click the red arrow in compose |
| Compose new mass email | C inside Gmail |
| Open GMass settings | Click the small arrow by Send |
| Send a test message | Use the “Test” link in settings |
Fonctionnalités cachées que la plupart des gens ignorent
- SMTP integration: Connect an external SMTP integration to send unlimited emails beyond Gmail’s limits for large mail merge campaigns.
- Accès API : Developers can use API access to launch email campaigns and pull GMass reports programmatically.
- Spam Solver: The spam solver rewrites risky lines so your email and mail merge sends clear spam filters.
- Behavior based campaigns: Build behavior based campaigns that fire triggered emails based on opens or clicks.
- GMass blog: The GMass blog covers deliverability tactics most cold outreach guides skip.
These extras turn a basic setup into a real outreach machine.
Most gmass users never touch them, which is exactly why they work.
Deliverability Tips That Actually Help
Send in plain text when you can, since it clears spam filters more easily.
Keep your first cold email short and free of links.
Warm up a new gmail account before you push real volume.
Use custom tracking domains so your tracking links match your brand.
Verify every list, because clean email addresses protect your reputation.
Watch GMass reports for sudden bounce spikes, which signal list problems.
GMass Common Mistakes to Avoid
A few simple errors trip up almost every new sender.
Avoid these and your email campaigns will perform far better.
Mistake #1: Blasting unlimited emails on day one
❌ Faux : Trying to send thousands of mass emails from a brand-new regular gmail account immediately.
✅ À droite : Warm up slowly, since a fresh gmail account has tight sending limits that protect deliverability.
New domains have no reputation, so providers watch them closely.
Ramp volume over weeks to build trust before you scale.
Mistake #2: Skipping email verification
❌ Faux : Importing old email ids without email verification, which spikes bounces and hurts your domain.
✅ À droite : Run email address verification on every list so dead email addresses never reach the send queue.
High bounce rates signal spam to every provider.
Clean lists keep your sender reputation strong over time.
Mistake #3: Ignoring follow ups
❌ Faux : Sending one cold email and assuming silence means no interest.
✅ À droite : Turn on automatic follow ups, because most replies arrive after the second or third follow up email.
Busy people miss the first email all the time.
A polite follow up sequence recovers those lost replies.
GMass Troubleshooting
Even a polished mail merge platform hits the occasional snag.
Here are the issues gmass users report most often.
Each fix gets your email campaigns moving again fast.
Problem: The GMass button is missing in Gmail
Cause: The gmass chrome extension did not load, or Gmail was open before install.
Réparer: Confirm the gmail chrome extension is enabled in Chrome.
Then refresh the gmail inbox once.
The red GMass button should reappear next to the search bar inside Gmail.
Problem: Emails land in the spam folder
Cause: Weak domain reputation or content that trips spam filters lowers your inbox placement.
Réparer: Run the email analyzer and spam solver first.
Switch heavy HTML to plain text where you can.
Then set up custom tracking domains so your tracking links match your sender domain.
Problem: GMass stops at the daily sending limit
Cause: A free gmail account caps near 500 sends, and even Google Workspace has gmail’s limits.
Réparer: Add SMTP integration to break Gmail’s sending limits.
Spread sends across multiple accounts when you can.
Or use campaign scheduling to drip mass email campaigns over several days.
Problem: Follow ups keep sending after a reply
Cause: The reply-detection trigger was left off in GMass settings.
Réparer: Open the sequence and enable the stop-on-reply trigger.
Reply management will then pause every follow up email the moment a lead responds.
Problem: Merge tags show up blank in sent emails
Cause: A column name in Google Sheets does not match the merge tag in your draft.
Réparer: Open the connected sheet and check the header row.
Make every merge tag match its column name exactly.
Then send a quick test message to confirm the fields fill in.
Problem: A campaign sends slower than expected
Cause: GMass spaces sends out to protect your gmail account from sending limits.
Réparer: This pacing is normal and good for deliverability.
Add SMTP integration if you need higher throughput.
Or use campaign scheduling to plan large mass email campaigns in advance.
Problem: Open and click tracking shows no data
Cause: Click tracking and open tracking were switched off before you hit send, or a corporate firewall stripped the tracking pixel.
Réparer: Re-open GMass settings and turn click tracking back on for the next send.
Pair it with custom tracking domains so your tracking links share your sender domain and dodge spam filters.
GMass tracks opens, clicks, and replies right inside Gmail once tracking is active again.
Problem: Verified contacts still bounce
Cause: The list was imported before email address verification finished running.
Réparer: Re-run email verification on the full list and wait for the green check.
GMass verifies email addresses before sending to cut bounces and protect your sender score.
Clean new contacts in Google Sheets, then relaunch the campaign once every email id clears.
Beyond these fixes, a short deliverability routine keeps cold outreach healthy at scale.
Cold email effectiveness rests on deliverability and domain reputation, so treat both as daily habits.
Keep in mind that GMass does not manage domain health or warm-up processes for you.
Warm a fresh gmail account by hand for two weeks before you launch email campaigns at volume.
Run the deliverability test on a small seed list, read the inbox placement report, then scale only what lands.
Lean on plain text for the first touch, save personalized images for later replies, and let auto follow ups do the patient work.
📌 Note: If none of these fix your issue, contact the GMass support team through the dashboard.
Qu'est-ce que la masse géométrique (GMass) ?
GMass is an email marketing platform and mail merge tool that lives inside Gmail.
Think of it like a mail merge engine bolted onto the gmail app you already use.
It works as a gmail chrome extension.
So you launch email campaigns from the same compose window you send normal mail from.
Regardez ce bref aperçu :
Here is some background that explains how GMass fits the wider email marketing picture.
What is mail merge, exactly?
Mail merge creates personalized emails from spreadsheet data.
Each row becomes one email with its own details filled in.
Email and mail merge together let you send at scale and stay personal.
Google Sheets can even generate personalized documents and unique attachments per recipient.
GMass is the engine that runs this merge inside Gmail.
It builds on what native Gmail offers and adds real scale on top.
GMass can send over 10,000 emails daily through SMTP integration.
It replaces clunky CSV files with live Google Sheets for organizing lists.
Cold email effectiveness rests on deliverability and domain reputation.
So GMass adds email verification and spam checking on top of the basics.
One honest caveat: GMass does not manage domain health or warm-up processes.
Pair it with a warm-up tool for serious cold outreach.
Il comprend les fonctionnalités clés suivantes :
- Automatisation des e-mails : Triggered emails and behavior based campaigns that run without you.
- Merge with Google Sheets: Personalized mail merge campaigns from spreadsheet rows.
- Automated Follow-up Emails: Auto follow ups that stop the moment a lead replies.
- Vérification de l'adresse électronique : Email address verification that trims bounces before you send.
- Rapports et analyses : GMass reports on opens, click tracking, and replies.
- Mass Scheduling: Campaign scheduling so you can schedule mass emails ahead of time.
Pour une analyse complète, consultez notre GMass review.
Le GMass blog also covers deeper deliverability tactics.
Principaux avantages de GMass
The biggest win is speed.
You launch email campaigns from inside Gmail in minutes, not hours.
The second win is personalization at scale.
Mail merge from Google Sheets makes every mass email feel one-to-one.
The third win is automation.
Auto follow ups chase silent leads so you never drop a thread.
The fourth win is deliverability.
Email verification and spam checking keep you out of the spam folder.
Together these benefits let a small team send like a big one.
Who Should Use GMass
GMass fits anyone who runs outreach from a Gmail inbox.
Sales teams use it for cold email and follow ups.
Recruiters use it to reach candidates at scale.
Founders use it to send mass email campaigns without a separate tool.
Agencies use it to manage multiple accounts for clients.
If you already live inside Gmail, GMass meets you there.
My Experience with GMass
My first campaign took under ten minutes to set up.
Connecting a Google Sheet for mail merge felt instant.
Auto follow ups gave me the biggest jump in replies.
GMass reports made it easy to see which subject line won.
The one gap was warm-up, which I handled with a separate service.
Two years in, it is still my default for outreach from Gmail.
GMass Pricing
Here’s what GMass costs in 2026:
| Plan | Prix | Idéal pour |
|---|---|---|
| Standard | 20 $/mois | Solo senders running their first campaign |
| Prime | 29 $/mois | Teams needing auto follow ups and behavior based campaigns |
| Professionnel | 49 $/mois | Power users wanting SMTP integration and API access |
Essai gratuit : Yes — GMass is still free to start.
The free tier has a limited send cap per day and a small label on outgoing mail.
Garantie de remboursement : Plans are monthly, so you can cancel anytime from GMass settings.
Which plan should you pick?
Standard suits solo senders launching their first campaign.
Premium adds automatic follow up emails and behavior based campaigns.
Professional unlocks SMTP integration, API access, and higher volume.
The free tier is a fine way to test how GMass works first.
It lets you send a small batch and see the dashboard in action.
Upgrade once you need unlimited emails or automatic follow up emails.
💰 Meilleur rapport qualité-prix : Premium ($29/month) — it unlocks the follow up features that earn the most replies.
GMass vs Alternatives
How does GMass compare? Here’s the competitive landscape:
Regardez cette comparaison :
| Outil | Idéal pour | Prix | Notation |
|---|---|---|---|
| GMass | Mail merge inside Gmail | 20 $/mois | ⭐ 4,8 |
| MailerLite | Simple newsletters | 10 $/mois | ⭐ 4,6 |
| ConvertKit | Créateurs et blogueurs | 15 $/mois | ⭐ 4,5 |
| ActiveCampaign | Automatisation du marketing | 29 $/mois | ⭐ 4,5 |
| Moosend | Automatisation budgétaire | 9 $/mois | ⭐ 4,4 |
| Brevo | Email plus SMS | 9 $/mois | ⭐ 4,4 |
| MailChimp | Marketing tout-en-un | 13 $/mois | ⭐ 4,3 |
Sélection rapide :
- Meilleur résultat global : GMass — mail merge and cold outreach without leaving Gmail.
- Meilleur budget : Moosend — automation at the lowest entry price.
- Idéal pour les débutants : MailerLite — the gentlest learning curve.
- Idéal pour les e-mails de prospection : GMass — auto follow ups and deliverability tools win here.
🎯 GMass Alternatives
Looking for GMass alternatives? Here are the top options:
- 💰 MailerLite : Clean drag-and-drop newsletters at a low price, though it lacks the Gmail-native mail merge and cold outreach focus GMass is built for.
- 🎨 ConvertKit : Built for creators and bloggers who want tagging and automation, but it leans toward broadcasts rather than personalized cold email campaigns.
- 🧠 Campagne active : Deep marketing automation and CRM features for behavior based campaigns, at a steeper price and learning curve than GMass.
- ⚡ Moosend : Budget-friendly automation with solid templates, a strong pick for teams that want email marketing without a Gmail workflow.
- 🚀 Brevo : Combines email and SMS with transactional sending, good for stores that need more than mail merge campaigns alone.
- ⭐ MailChimp : The popular all-in-one platform with landing pages and reporting, better for newsletters than for cold outreach from Gmail.
Pour la liste complète, consultez notre GMass alternatives guide.
⚔️ GMass Compared
Here’s how GMass stacks up against each competitor:
- GMass vs MailerLite: GMass wins for cold email and Gmail-based mail merge; MailerLite wins for branded newsletter design and ease.
- GMass vs ConvertKit: GMass wins for outreach campaigns and follow ups; ConvertKit wins for creator monetization and tagging.
- GMass vs ActiveCampaign: GMass wins for fast Gmail sending; ActiveCampaign wins for advanced CRM and multi-channel automation.
- GMass vs Moosend: GMass wins for mail merge inside Gmail; Moosend wins for low-cost standalone email marketing automation.
- GMass vs Brevo: GMass wins for cold outreach from Gmail; Brevo wins for combined email and SMS plus transactional mail.
- GMass vs MailChimp: GMass wins for personalized mail merge campaigns; MailChimp wins for landing pages and audience management.
Common Ways to Use GMass
GMass fits many jobs that all start in the same Gmail inbox.
Here are the most common ones gmass users rely on.
prospection commerciale
Send personalized cold email to a list of prospects.
Let auto follow ups chase the leads who go quiet.
Recruiting
Reach dozens of candidates with one mail merge campaign.
Track opens and replies so no strong candidate slips away.
Newsletters and updates
Send mass email updates to customers from your own gmail account.
Use click tracking to see which links readers care about.
travail d'agence
Manage multiple accounts and run campaigns for several clients.
API access and SMTP integration keep large sends running smoothly.
Start Using GMass Now
You learned how to use every major GMass feature:
- ✅ Automatisation des e-mails
- ✅ Email Analyzer
- ✅ Email List Builder
- ✅ Email Link Checker
- ✅ Merge with Google Sheets
- ✅ Rapports et analyses
- ✅ Test de délivrabilité
- ✅ Automated Follow-up Emails
- ✅ Mass Scheduling
Étape suivante : Choisissez une fonctionnalité et essayez-la dès maintenant.
Most people start with Email Automation.
It takes less than 5 minutes to launch your first campaign.
GMass can handle the rest from inside your gmail inbox.
From there, layer in mail merge and auto follow ups.
Then watch your GMass reports to see what earns replies.
Step by step, you turn a plain gmail account into an outreach engine.
Foire aux questions
Is GMass easy to use?
Yes. GMass installs as a Chrome extension and runs inside Gmail, so you send mass email from the same compose window you already know.
How many emails can I send with GMass per day?
GMass can send over 10,000 emails daily through SMTP integration, well past a free Gmail account’s roughly 500-per-day limit.
How do I send a mass email through Gmail?
Install the GMass Chrome extension, paste your list or connect Google Sheets, write your message, then click the red GMass button to send.
How to use GMass for mail merge?
Connect a Google Sheet in the compose window, add merge tags like {FirstName}, then send. GMass personalizes every mass email automatically.
Is GMass no longer free?
GMass is still free to start. The free tier caps daily sends and adds a small label, while paid plans begin at $20 per month.
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