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 then in the middle, you decide you want to stop. You may have set auto follow-ups on a particular campaign, but you can’t handle the volume of replies you’re getting, so you may want to stop GMass from sending any more auto follow-ups. Your account may have been hacked, and the hacker installed GMass and configured it to send emails over time.

Here’s how to stop GMass from sending emails.

To cancel a particular mail marge campaign

If you have a scheduled mail merge, it will show under the “GMass Scheduled” label. To cancel and prevent it from sending at its scheduled time, just remove the “GMass Scheduled” label from the Draft, and that will prevent GMass from seeing it. The scheduled job will error out and prevent the mail merge campaign from sending.
This also applies to a large campaign that has been set to send over multiple days. If after a couple of days, you decide you don’t want the rest of it to send, just remove the “GMass Scheduled” label, and further sending will be prevented.

To stop auto follow-ups from sending for a particular campaign

After you’ve launched a campaign with automatic follow-ups, you can edit the auto follow-up settings by finding the campaign under the GMass Auto Followups Label. Open the Draft, click the GMass Settings arrow, and click the Clear all auto follow-ups button. Then hit the GMass main button to save your changes. Also see this detailed guide on canceling auto follow-ups.

To disconnect GMass from your Gmail account and prevent GMass from sending any emails in the future

Go to:

Find GMass listed here, and click the REMOVE button.
Starting Thursday, September 8, 2016, we will be changing the sending limits for free accounts.

Previously, a free account was limited to sending 50 emails at a time, with no restrictions on how many total emails it could send per day. For example, if a free user wanted to send 1,000 emails, the user could split his email list into 20 batches of 50 email addresses each, and send 20 times.

Starting on Thursday September 8, 2016, however, we will be placing an additional restriction on free accounts of 50 sent emails per 24 hours.

We are doing this to curb the abuse of free accounts.

I’ve written extensively about the importance of having a dedicated tracking domain for your GMass account. Now, you can set your tracking domain all on your own after you’ve implemented the DNS setup for it.

Set your dedicated tracking domain in GMass

Compose a new message in Gmail, put in the To field, and put the tracking domain you created in the Subject. Then hit the main GMass buttonDo not hit the Send button.

In this example, my G Suite email address is, and I’m setting as my tracking domain. I must hit the GMass button, not the Send button.

Note: For instant approval, your tracking domain must contain the domain of your G Suite email address. Meaning, if you are, your tracking domain should be something like If your email address domain and your tracking domain don’t match, your request will be accepted but will be held for manual approval.

To clear your tracking domain settings

If you want to clear your custom tracking domain so that your mailings revert to the system shared tracking domain, do the same as above except put the word “clear” (without the quotes) in the Subject line. That will clear the tracking domain for your account, and if your account is a G Suite account, it will also clear the tracking domain for any other GMass accounts of the same domain name.


GMass Flying EmailsGmail 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 even claimed that with GMass, if you’re a G Suite user, you can send a 10,000 recipient campaign, where GMass will evenly distribute the campaign at 2,000 emails/day for 5 consecutive days.

So if you’re using GMass, you should be able to send 60,000 emails/month (2,000/day x 30 days in a month) from a single G Suite account, right? As it turns out, that usually isn’t the case.

In working with over 40,000 accounts in the last year, we’ve noticed that Google often throttles the number of emails a particular account can send based on a variety of factors, including:

  • How old the particular Gmail or Google apps account is (the older, the better)
  • How many conversations exist in the account (may existing conversations are better)
  • Whether the account has sent mass emails before (if it has, then you’re better off)
  • The content of the mass emails (non-spammy content)
  • The bounce rate of the overall account (the lower the better)

We don’t have exact rules on how Google decides how many emails an account can send at a particular time, but here’s what we’ve observed:

  • A new Gmail account (ending in or with no history has very limited sending ability. Sometimes you are limited to 10 emails right when the account is created.
  • A new G Suite account, where the organization itself is new to Google Apps, also has very limited sending ability.
  • A new G Suite account, where the organization has a history with Google Apps, can send near the 2,000 emails/day limit almost right away

So what happens when you try to send, and Google decides you are over limit?

Using GMass, you’ll notice that Gmail will start bouncing the emails and the bounce notification will look like this:

This is the Bounce you’ll see if GMass sends an email when your account is over limit.
If you are in the Gmail interface, and you try to send a regular email with the regular blue Send button, you’ll be stopped with a popup that looks like this:
This is the error you’ll get if you try to send an email with the regular Gmail Send button when your account is over limit.

What does GMass do when it detects that your account is over limit?

GMass looks for bounce notifications like the one shown above to determine if your account is over limit. In fact, while it’s sending your campaign, it’s also simultaneously monitoring for these bounces. If the bounces start to appear, and you are technically under the 500 or 2,000 limit, then GMass pauses your campaign for an hour and tries to continue sending later.

Does GMass re-send the emails that have already bounced?

No, GMass won’t automatically resend the emails that have bounced with an over-limit message, but you can easily resend these emails after you determine that your account has more sending ability.

Special Privilege for G Suite Users

If you have a G Suite account, and you’ve reached your limit and are unable to send emails, you have the option of having your G Suite administrator “reset” your account. This is done through the G Suite Admin console. By resetting your account, your daily quota is immediately reset. This option, however, can only be used 5 times per year per account, so use this sparingly…only in situations where you’ve hit your limit and you absolutely need to send more email, whether it’s through GMass or person-to-person email with the regular Send button.

Does subscribing to a paid GMass account improve my ability to send?

No, it does not. Whether you have a free or a paid GMass account, your overall sending limit per day is the same and is determined by Gmail, not by GMass. A free GMass account limits you to 50 emails at a time, but only Gmail imposes restrictions on total emails sent per day. We’ve had users express surprise that they subscribed to GMass, yet still couldn’t send as many emails as the Gmail published limits, so it’s important to know that GMass has no ability to control how many total emails you can send per day.

So how many emails can I natively send with GMass and Gmail?

If you have a Gmail account with an excellent reputation, you’ll usually get your 500 email limit for the first 24 hours but only a subset of that for the second 24-hour period. Meaning, if you send 750 emails, where GMass sends the first batch of 450 now (so you have a buffer of 50), and the remaining 300 24 hours later, that usually works. Avoid sending 900 though, because then you would need your full sending ability during the second 24-hour period.

If you have a Google Apps account with an excellent reputation, you’ll usually get the full 2,000 email limit for the first 24 hours but only a subset of that for the second 24-hour period. So, you can probably send 3,500 emails, where 1,950 go out the first day, and the remaining go out on the second day, but if you were to send 4,000 emails, you might get some bounces on the second day.

Breaking Gmail’s sending limits

Using a new capability introduced in October 2017, you can now “break” Gmail’s sending limits and send an unlimited number of emails through your Gmail account. It works by connecting your account to a third-party SMTP service like Sendgrid. You still launch your email outreach campaigns from Gmail, just like normal, but your emails bypass Google’s servers and are sent via the third-party SMTP service instead.

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 folder or even worse, are flagged as being as a scam.

Why is this happening?

As we’ve mentioned before, because GMass has been a free email marketing system for so long, it attracts a plethora of spammers. GMass is an unmonitored system, and when you send emails with open and click tracking, the domain that gets inserted into your emails is the same domain that gets inserted when a spammer sends. If Google flags that domain, then this results in emails ending up in Spam or being flagged as a scam.

What is this domain you are talking about? Do you mean the domain in my email address?

No, that’s separate. We are referring to a domain that gets inserted into the body of your email in order to make open and click tracking work. This is what we call a “tracking domain”. Typically it is something like Here’s an example:

How do I separate my legitimate emails from the spammers’ email?

You need a dedicated tracking domain for your GMass email campaigns. If you implement this, you essentially guarantee yourself 100% deliverability. If you don’t, you are risking the chance of getting poor Inbox deliverability.

I want a dedicated tracking domain. What’s my next step?

If you are able to add a DNS record for your domain…

You can easily set up a branded tracking domain for your GMass accounts that is based on your OWN domain name. Just add a CNAME record for the tracking domain you choose ( for example) to point to “”. Detailed setup instructions here.

If you can’t add a DNS record to your existing domain…

If you don’t know how to manage DNS records or don’t have access to do so, you can register a tracking domain from scratch specifically for use with GMass.

Which is better: setting up a dedicated tracking domain based on my own domain, or having you provide one to me?

If you know how to manage your domain’s DNS settings, as mentioned in the prior question, it is preferable that you set up a tracking domain based on your own domain. The “hover effect” is optimized here — when your recipients hover over a link in your email campaign, and notice where it points before they click, they are more likely to click if they recognize your domain. The GMass-provided dedicated tracking domains will never look as polished as your own, but it’s simply a matter of cosmetics. The 100% deliverability is achieved either way.

Why do you let spammers use GMass?

GMass by design is an unmonitored system. I chose to do it that way because Google already shuts down spammer accounts for us, so there’s really no need for GMass to have its own monitoring in place. That said, even Gmail’s spam and abuse detection isn’t perfect. So some spam does still get sent by Gmail accounts, and when that happens, domains included in those spam messages get flagged, including the shared tracking domain that GMass uses to implement open and click tracking.

If the shared tracking domain gets flagged, can’t you just switch it out for a different one?

Yes, we do switch out the shared tracking domain periodically, but inevitably, spammers will cause the new shared tracking domain to get flagged, causing the issue to surface again.

Is this a new issue for GMass, or has this been happening for a while?

This is a relatively new issue. In the past, even though the shared tracking domain would get flagged, emails would bounce with a block notification. We can then detect that and assign a dedicated tracking domain to the affected user to eliminate the issue going forward. Now, however, we are noticing emails are still getting delivered, but just going to Spam. That wasn’t happening before.

Can you detect if my emails are being flagged?

In some cases we can, and in some we can’t. If your email is flat out blocked by a recipient, then a bounce is generated. GMass then detects the block and reports it to you under the GMass Reports folder. We also send a daily report to those users experiencing a lot of blocking encouraging to get a dedicated tracking domain. However, in cases where the email isn’t outright rejected, but is instead routed to the Spam folder or is flagged as a scam, we have no way of knowing this, so we can’t detect it and then inform you. That’s why it’s best to be proactive and get a dedicated tracking domain even if you’re not having delivery issues.

If I turn off open and click tracking, will that solve the issue?

Yes, you can also achieve 100% perfect deliverability by turning off open and click tracking, but you really don’t have to if you go through the simple process of setting up a dedicated tracking domain. Then you get the best of both worlds: perfect deliverability and detailed analytics.

This is too hard. I don’t understand. Can you just set this up for me?

Yes, just tell me that’s what you want. If you’re unable to create a dedicated tracking domain based on your own domain, you can register a new one from scratch.

If you can easily set this up for me, why don’t you just do it for every GMass user?

Because that would be really expensive and time consuming. Over 45,000 accounts have signed up for GMass, and it’s only been available for 11 months. If we had to register 45,000 domains, one for each user, we’d be incurring huge expenses. If we just do it for the people that ask, it’s much more manageable.

I sent some test emails with GMass and they landed in Spam, and then I used a different service, and they went to the Inbox. Doesn’t that mean that people are blocking GMass?

No. People are blocking the shared tracking domain that GMass uses, which is why its advantageous for each legitimate GMass user to use their own dedicated tracking domain, one that nobody else uses. That way, you can never get mixed up with a spammer’s emails, and your emails will sail through to the Inbox. The reason it may not happen with another provider, is because the other provider hasn’t been a free service, and therefore detracts spammers rather than attracts spammers.

What about GMass’s IP addresses? Do they have a good reputation?

No email is actually sent from GMass’s IP addresses, so GMass IPs are irrelevant. All email is sent from our users’ own Gmail accounts, meaning the emails are sent from Gmail’s IP addresses, and Gmail’s IP addresses have the best email sending reputation in the world.

I’m an experienced email marketer and have used other platforms prior to GMass and never had this issue. Why does GMass have this issue?

Because GMass has been a long-time free and unmonitored system. No other email marketing system in the world is free and would dare be unmonitored. Every service from MailChimp to Hubspot has systems in place to prevent spammers from sending email. GMass does not. This was decided intentionally, because GMass is a unique service in that it’s built on top of Gmail rather than a standalone service.

I find it hard to believe that if I take this one step, I can achieve 100% perfect deliverability. Are you being serious?

Absolutely. If you have a dedicated tracking domain and you send with GMass, you will achieve 100% deliverability (except for invalid addresses that legitimately bounce).

Isn’t GMass about to start charging for services? Will that change anything?

Yes, on Monday, August 15, when GMass places limits on free accounts can do, this issue will be substantially mitigated. However, it is still a best practice to set up your own dedicated tracking domain.

So other than getting a dedicated tracking domain, do I need to do anything else to ensure my email goes to the Inbox?

As a best practice, you should set up SPF if you’re a Google Apps user. If you have just a regular or account, you don’t have to do anything.

I have received confirmation from you that my dedicated tracking domain is in place. How do I use it?

Don’t do anything differently — just send as you normally would. The dedicated tracking domain will be inserted automatically into your emails.

Now that my dedicated tracking domain is in place how can I resend my email campaign to people that didn’t get it before?

GMass makes it easy to resend your campaign to people that blocked your campaign previously. Just follow these steps.

GMass is back up and running! We went over hour maintenance window by about an hour — sorry about that.

First, here’s the GMass Pricing page where you can subscribe.

Free versus Paid

Q: Do I have to upgrade to a paid account? Can I just keep using my free account?

A: Free accounts are limited to sending 50 email messages per day. All other features work with free accounts.

Q: What features won’t work with a free account?

A: All features work with a free account. The only restriction with free accounts is that you can’t send to more than 50 email addresses in a 24-hour period.

Q: What if I have a paid account, send a big campaign, and then downgrade to the free account right after? Will I still be able to collect Reporting data on my campaign?

A: Yes, you’ll still receive all Reporting data.

Gmail versus G Suite

Q: Pricing plans for accounts used to cost less than for G Suite accounts, but now they’re all the same. What happened?

A: Starting March 18, 2019 we have simplified our pricing so that all accounts pay the same, regardless of whether they’re Gmail accounts or G Suite accounts. This is part of our website redesign. The original reasoning behind the different pricing levels was that accounts have lower sending allowances than G Suite accounts, so an account should pay less for GMass than a professional G Suite account. Now that we’ve introduced unlimited sending options, that difference in sending ability isn’t as relevant. We have some users sending tens of thousands of emails a day. Additionally, we found that many users were confused by the two sets of pricing plans, so this simplified pricing will eliminate that confusion.

Q: I have a subscription from before March 18, 2019, and my account is a account. Will I now be charged at the higher rate?

A: No. For now, all existing subscriptions are grandfathered into the old pricing scheme. This also applies to upgrades. For example, if you have subscribed an account and you’re on the Standard Plan paying the old pricing of $8.95/month and you upgrade your account to Premium, you will pay the old pricing of $12.95/month rather than the new pricing of $19.95/month. If you have subscribed a G Suite account, then the pricing is the same anyway, so nothing changes for you as well.

Q: How do I know whether I have a Gmail or a G Suite account?

A: If your Gmail account ends in or you have a Gmail account. If your Gmail account ends in your own domain, like, for example, then you have a G Suite account.

Q: I manage multiple Gmail accounts, and want to use GMass with all of them. Do I get a discount?

A: If you’re a G Suite user then you can buy a Team Plan for your G Suite domain, and save on the per-user cost. If you’re a regular Gmail user with multiple regular Gmail accounts, we don’t offer a discount because the prices are already the lowest we can offer.

Q: I sometimes get bounces from Gmail when I try to send that say I’m over my limit. Will subscribing to a paid plan fix that?

A: No. If Gmail is bouncing your emails because you’re over limit, subscribing won’t have any effect on that. Subscribing will allow you to send more than 50 emails in a day, but if Gmail is already limiting your sends, subscribing to GMass can’t fix that. What can help with that is the GMass unlimited sending option, which allows you to send your emails through an external SMTP server.

Q: What will the GMass footer look like?

If you choose a Minimal plan, a footer will appear on your sent emails. The footer will look similar to the link below:

Email marketing inside Gmail

but the text will vary with each campaign you send.

Q: I see the GMass footer on the bottom of my sent emails. Can I pay extra to have it removed?

A: Yes, the footer only appears if you’re subscribed to a Minimal plan. Both the Standard and the Premium plans do not force the GMass footer on your emails.

Subscribing, Canceling and Upgrading

Q: How do I subscribe to a paid account?

A: First make sure you’ve installed GMass and connected GMass to your Gmail account. Then go to, choose a plan, and enter your payment information.

Q: What email address should I use in the payment form?

A: You should use the email address that is the address of the Gmail/G Suite account with which you’d like to use GMass.

Q: I accidentally subscribed the wrong account. Can I transfer my subscription to a different Gmail account?

Yes, if both accounts are connected to GMass, and if the transfer-from account is a paid account and the transfer-to account is a free account. If these conditions apply, follow these instructions to transfer your subscription.

Q: How do I upgrade from one level to the next?

A: See these instructions to easily upgrade or downgrade GMass plans.

Q: How do I cancel my paid account and downgrade to a free account?

A: Follow these simple instructions to cancel your GMass subscription.

Q: My Gmail account has become disabled. Therefore I can’t log in to follow the cancellation procedures. How do I cancel?

A: You can still cancel your subscription yourself. See the cancellation instructions. They explain how to cancel even if you’ve lost access to your account.

Q: I only need to send an email once a quarter. Can I subscribe, then send, then cancel?

A: Yes, you can. You will have to pay for the whole month though, but feel free to subscribe during just the months when you need to send. During the time that you’re not subscribed, all other features, like reporting, will still work.

Q: Can I use one single subscription with multiple Gmail accounts?

A: No, you must purchase a GMass subscription for each Gmail account you want to send large campaigns from. If, however, you have different From alias addresses configured in your single Gmail account, then you only need one GMass subscription and can still send “from” each From address configured in your Gmail account.

Q: I’m getting billed for a GMass subscription, but I don’t know which account is subscribed, so I can’t cancel it. What do I do?

A: First, try figuring out which account is subscribed yourself. 1) Click the GMass Settings arrow in a Compose window, and looking in the lower right corner for your account status. If that account is subscribed, it will say “Minimal”, “Standard”, or “Premium” in the lower right corner. 2) You can also determine which account is subscribed by searching your email like this:

subject:"gmass billing"

If you still can’t figure it out, provide the last 4 digits of your credit card and some other identifying information to our Support team.

Q: I accidentally subscribed when I didn’t mean to. Can I get a refund?

A: You can request a refund, and if your account meets certain criteria, the refund will be granted automatically by your request.

Payment Methods

Q: What payment methods do you accept?

A: GMass accepts credit card and PayPal. We used to accept Bitcoin, but then our primary payment processor, Stripe, deprecated its support for Bitcoin, so for now, we are not accepting Bitcoin.

Q: What will I see on my credit card?

A: The charge will say “GMASS”.

Q: Do you accept PayPal?

A: Yes, if you can’t pay by credit card, you may pay with PayPal. See our PayPal subscription page to subscribe with PayPal.

Q: How can I change the credit card associated with my account?

A: Follow these instructions to change your credit card.


Q: Do you have a discount for .org and .edu accounts?

A: Yes, if you are a G Suite user with a .org or .edu domain, you will enjoy 15% off the published prices automatically.

Q: I’m a .org or a .edu user. I see that you offer a 15% discount, but when I go to subscribe, the price shown doesn’t reflect a 15% discount. Why not?

A: The discount is actually calculated after you subscribe and can’t be shown at the time you subscribe and enter your credit card. — but we promise that a 15% discount will be applied to your initial payment and all recurring charges.

Q: I’m a non-profit but my domain is not a .edu or .org domain. Can I still get the discount?

A: Unfortunately the discount is automatic and only applies to .org and .edu domains. We understand that you may be a non-profit running under a .com or other domain, but in the interest of keeping GMass as automated of a system as possible, we can’t apply this discount to you in this scenario. We still love you and hope you’ll choose to subscribe. GMass is a low-cost service, and we sincerely hope the lack of discount in this scenario doesn’t sway your decision to subscribe.

Q: I really need GMass but can’t afford it. Can I wash dishes instead?

A: We don’t have any dirty dishes, but if you have a blog with at least moderate readership, we’d love a blog post describing what you like about GMass and how you use it for your organization. Contact our support team for more details.

Billing Questions

Q: On what date will I be billed?

A: You are billed on the monthly or annual anniversary of the date you subscribed.

Q: How can I see my GMass invoices?

A: Follow these instructions to retrieve your GMass invoices.

Q: I want to send a 1,000 person campaign but don’t want to upgrade to a paid account. Can I just use my free account to send to 50 people 20 times?

A: Sorry, free accounts are limited to sending 50 emails per rolling 24 hours.

Q: Do you charge sales tax?

A: No.

Q: What happens if I try to send a large campaign from a free account?

A: The send will fail and you’ll get a message in the yellow bar at the top of your Gmail account indicating that the send failed. You’ll also then be given the option to upgrade to a paid account.

Q: What happens if I try to configure auto follow-ups from an account without auto follow-up privileges?

A: The send will fail and you’ll get a message in the yellow bar at the top of your Gmail account indicating that the send failed. You’ll also then be given the option to upgrade to a paid account.

Team Plans

Q: If I purchase a G Suite Team account, what plan do my individual users get subscribed to?

A: All team plans are for the highest level, Premium account. So all members of your team will have a Premium account.

Q: Who has the authority to buy a team plan for a G Suite domain?

A: Anyone that belongs to your domain can create a GMass Team Account.

Q: How do I choose which users are part of my Team Plan?

A: You can view, add, and delete team members by following the instructions here for Team Plan management.

Q: Can I purchase a team plan at the Minimum or Standard levels?

A: No, Team Plans are all at the highest, Premium level.

It’s been quite a journey. GMass started as my passion project, because I wanted an easy way to send email campaigns from my Gmail account using Gmail’s own interface and Compose Window.
 I wrote the first line of code for GMass in June of 2015 from a hotel room in Honolulu and released the first version of GMass in September of 2015. Since then:
  1. GMass has had over 40,000 signups.
  2. My developers and I have spent over 3,000 hours writing code.
  3. I’ve interacted with over 1,200 users by email, Gchat, iMessage, phone, and Skype.
  4. GMass has sent 42,000,000 emails, all through users’ Gmail accounts.
  5. I’ve invested over $300,000 of my own money into building and marketing GMass.
  6. I’ve launched 31 new features.
  7. I’ve registered and hosted over 800 .xyz and .us domains so that my users can have dedicated tracking domains, at no charge to my users.
The time has come to convert GMass from a free service to a paid service. It’s the only way I can continue building the product, supporting users, and upgrading servers to handle load. I hope that you’ve had an excellent experience with GMass so far and will consider supporting it through a paid account.
I’ll be sending you details on pricing soon, but generally, pricing will range from about $7/month to about $20/month per user, depending on whether you have a regular Gmail or Google Apps account, and whether or not you use auto follow-ups. If your organization is on Google Apps, you’ll also be able to purchase a team-plan for multiple users. I’ve attempted to make pricing affordable for everyone including non-business users, but I will also provide an option for continuing to use GMass without pay in exchange for some promotional help.
If all goes according to plan, I’ll announce a pre-sale in a few days, with the goal of fully converting to a paid system on August 15.
My primary focus over the next couple of weeks will be getting all this ready. If you have any questions, comments, or feedback, I’m all ears.