You can now create and apply your own custom Gmail Labels to campaigns, to help you keep your mail merge campaigns organized. For example, if you’re sending emails on behalf of different clients, or different projects, you may wish to create a Gmail Label for each individual client or project.

Let’s say I’m launching several email marketing campaigns for 3 different clients from my one G Suite account. I can create the following Labels: Client A, Client B, and Client C.

I create a Label called “Client A” in my Gmail account.

While I’m composing my email, I can apply one of my custom Labels to the message.

Important: In order for the Label setting to be saved you must make one more change to your campaign, either in the Subject or Message, after applying the Label. If need be, you can just type some text and delete it after applying the Label. This is a quirk of how Gmail and GMass work together.

I apply the “Client A” Label to my email while I’m composing it. I must make one more change to the campaign after applying the Label in order for the Label to apply to the message.

That Label will then also apply to all of the individual sent emails. Or, if I’m using the Just create Drafts option and not actually sending emails right away, all of the generated Drafts will have the custom Label applied.

After my emails are sent, I can see that the Label “Client A” has been applied to each sent email.

Doing so allows me to search by a custom Label if I want to quickly see the emails related to a particular client or project.

I can quickly see all the emails for “Client A” by clicking the “Client A” Label on the left.

You can take this one step further and now build a new email list for a new campaign based on the messages in the Client A Label. Perhaps I want to further refine the Search criteria to include a Subject filter. Then I can use the GMass “magnifying glass” button to build an email list based on this Label and the search criteria.

I can refine my search criteria along with the Label filter, and build a new email list for a new campaign based on the search criteria.

More information on Gmail Labels

While this article teaches you how to use your own custom Labels to organize individual sent emails, you may also be interested in learning about the GMass-specific Labels that get created and applied automatically as you create and schedule email campaigns.

When you create a mail merge campaign in GMass, the campaign is temporarily saved as a Gmail Draft, and based on the state of the campaign, it will have one or more Gmail Labels applied to it.

  • If the campaign is set to send in the future, but does not have any auto follow-ups, it will have just the GMass Scheduled Label applied to it. This is the most common scenario.
  • If the campaign is set to send in the future and also has auto follow-ups, it will have BOTH the GMass Scheduled and the GMass Auto Followups Labels applied to it.
  • If the campaign has finished sending but has pending auto follow-ups, it will have just the GMass Auto Followups Label applied to it.
  • If the campaign has finished sending and also does NOT have any auto follow-ups, the Draft will be deleted.

What do the Gmail Labels mean?

If a Draft has the GMass Scheduled Label, that means it’s a pending mail merge campaign and emails will still be sent. If the GMass Scheduled Label is removed, the campaign will fail to send.

If a Draft has the GMass Auto Followups Label, that means the campaign has auto followups attached to it. This Label is simply for organizational purposes, so you the user, can easily see which campaigns still have pending auto followups. Whether this Label is applied to the Draft or not has no bearing on whether the auto follow-ups send or not.

Use your own Labels

In addition to the Labels that GMass uses to manage your campaigns, you can also apply your own custom Gmail Labels to organize your emails.

The Gmail file size limit can be quite frustrating.

As Gmail refuses to send emails with more than 25Mb of attachments, it’s hard to send large presentations, images or videos.

However, there’s a workaround. In this article, I’ll show you how to bypass the current Gmail attachment limit and send as many big files as you want!

Here’s what we’ll cover:

Understanding The Current Gmail Attachment Limit

In 2017, Google announced that they were increasing the Gmail file size limit to 50 megabytes. However, there was a catch.

That 50Mb attachment size limit was only for incoming email. So while you could receive emails with more information, you were still stuck with a restrictive 25Mb limit for uploading.

To make matters worse, the 25Mb file sharing limit isn’t really 25Mb.

Let me explain:

Gmail lets you share files up to 25 MB in size, where the size is determined by the size of the file on disk. If you attach a file larger than 25 MB in size, it gets uploaded to Google Drive and Gmail places a download link to the file in the body of your email message.

If you attach big files greater than 25 megabytes, the Gmail app uploads it to Google Drive and links to it instead of attaching it.

However, even if you share files smaller than 25 MB, bypassing the need to use Google Drive, the actual email messages end up being around 50 MB in size, because of how an attachment file doubles in size when encoded into the format necessary for email file sharing (MIME).

Long story short – the files you attach to your email generally double in size in Gmail due to how it encodes an attachment file.

So what Gmail users are left with is a file size limit that’s essentially 12.5Mb!Even if you use email apps like GMass that use Gmail API, it doesn’t entirely solve your problem.Why?The Gmail API has a hard file sharing limit of 35 MB for your email message.

Therefore, in terms of using GMass and most other Gmail API based mail drop apps, your complete Gmail mail message, when encoded into MIME format, cannot exceed 35 MB.

That equates to roughly 17-18 MB of added files such as an inline image or any additional documents.

Even though my attachment is only 24 MB as it sits on my computer, it expands to over 44 MB when MIME-encoded in my Gmail inbox and I get an error message for my GMass request in the browser.

Also note that the GMass size limit is applied to an individual email message, not all emails in aggregate. It doesn’t matter whether you’re sending it to one email address or to 1,000, the MIME-encoded email you compose cannot exceed 35 MB.

2 Easy Ways To Deal With The Gmail File Size Limit

There are two simple methods to workaround the gmail attachment size limit. Let’s go over each one:

1. Use Google Drive

This is the default option for most people trying to share files that are larger than 25Mb. When Gmail detects that your mail is larger than 25Mb, it automatically uploads your attachments to Drive and adds a download link to it in your mail.

While this automatic process is helpful, it can be a little unwieldy to work with – especially if you’re dealing with multiple large files. For a more structured process, it’s recommended that you manually use Google Drive to upload large attachments that exceed 25Mb.

Here’s a quick walkthrough on how to use this cloud storage method:

Step 1

Sign up for Google Drive in your browser. Google Drive is a cloud storage and file sharing service that gives you a higher storage limit than a regular Dropbox account.

Once you sign up for Google Drive using your Google account, you’ll have instant access to 15GB of cloud storage space for free!

Step 2

Create a folder in Google Drive.

Once you’re in Google Drive, click the My Drive icon that’ll open up a drop-down menu tab in your browser where you can directly upload the file or create a separate folder.

Step 3

Once you’ve added your files/folders to Drive, you can open your Gmail inbox tab and start to compose your mail. Locate the Drive icon at the bottom of the window to find the files you’d like attached.

Step 4

You’ll now see all the files/folders stored in your Google Drive account. Select the ones you want to be uploaded and click the Drive icon titled “Insert as Drive Link” at the corner of the screen.

The Gmail app will now add a download link to these attachments in your email. All you have to do now is to click the “Send” button.

When recipients receive the mail, they can click on the link and will be redirected to these attachments.

2. Compress Your Files

Another easy way to get past the gmail client file size limit is by sending compressed files.

If you have multiple big files that need to be uploaded, you can always compress them into a zip folder. Zip folders take up less place and are easier to transfer to other computers.

Here’s how you compress files in Windows 10:

Step 1

Open File Explorer on your computer and navigate to the data and documents you’ll be sending.

Step 2

Click the “Control” key and select all these files you’d like to compress.

Step 3

Right-click and select “Send To > Compressed Zip folder” in the drop-down menu.

And that’s it!

You’ve now compressed all your large files into a zip folder. This change in size should take less space when uploading – helping you meet Gmail’s requirements.

Note – Zip folders can’t work miracles and usually only reduce the size of your large files by 30 to 40 percent. If the zipped folder still isn’t small enough for Gmail, then you’re out of luck. You’ll have to opt for the cloud storage route to get your files attached when you compose an email.

Tracking Your Attachment Opens

Using Google Drive to send a file link instead of sending attachments has three benefits:

  1. An attachment file usually triggers the spam filter in many organizations. Your recipients may not even receive the email as it lands in the junk folder.
  2. Many people are wary of opening any email files attached, even if the data is from known senders, to avoid risking malware. Links are usually considered far safer in an email exchange.
  3. Finally, when links are used, it enables the sender to actually track if people have clicked on the link or not right from their Gmail inbox.

How GMass Helps

Mail drop apps like GMass can help users track Drive links. This service supports click-tracking to help you determine if a person has opened your Drive link or not. This can be incredibly useful when sharing proposal documents as you’ll know when the recipient has accessed the links.

Just navigate to the “GMass Reports > Clicks” tab in your Gmail app and you can see all the tracking information:

Note – To prevent your links from looking like phishing links, GMass does not track links where the anchor text itself is the URL. We recommend that the sender re-labels their Google Drive download link to avoid this issue.


The fact is that the world’s most used email service provider can’t handle emails larger than 25 megabytes of data. Whether you use Gmail’s POP or IMAP server, the story remains the same.

However, until Google releases a new update (that actually helps a sender with uploading files) users can always send Drive links from their desktop device or their Android or iOS Gmail mobile app.

In the meantime, if you usually send out multiple emails at once, why not install the GMass mail merge chrome extension?

It can merge your emails and make mass emailing a breeze! Sign Up for a free account in just a few seconds here.

See the bottom of article for real-time updates on this developing story.

Today I received a Google Docs “invite” from a friend of mine, and after investigating, I’ve learned that lots of people are getting fake Google Docs invites. The Twitter-verse is ablaze right now with reports of people getting these:

So what is the scam and how it is it spreading so quickly? You get an email from someone you actually know that looks like:

Yolanda Oster is a real friend of mine, making this email look even more authentic. If you click the Open in Docs button, you’re taken to a page on Google’s server, asking for permissions to your Inbox from an app called “Google Docs”. The tricky part is that “Google Docs” is not the Google Docs you know and love.

It’s a fake app that is named Google Docs, but it’s actually a guy named Eugene Pupov trying to trick you. Click the blue “Google Docs” link to get more info on the app:

Since the app will allow access to “manage your contacts” and “read, send, delete, and manage email”, it gives the attacker full access to your Inbox. It also allows the attacker to propagate the scam by sending the same email to all of your contacts.

I’m an expert at this because GMass requires the same type of access in order to send your mail merge campaigns through your Gmail account. Of course the difference is that GMass is a legitimate app providing a legitimate service, whereas is trying to gain access to your account for far more sinister reasons.

Here’s what happens if you click ALLOW:

You’re taken to a page that looks like an Error page, but see the highlighted part? That’s an access token that’s likely been saved by the hacker, and that access token can be used to read the contents of your entire Gmail account.

What do you do if you already gave up access to your account?

Go here to view the apps connected to your Google Account and remove the fake “Google Docs”.

Remove the fake “Google Docs” app from the list of apps connected to your Google account.

Should you change your password?

Unfortunately, changing your password or enabling two-factor authentication will have no effect. The hacker has his own way into your Gmail account, and that is via the OAuth 2.0 access token shown above.

Who is Eugene Pupov and how can you get revenge?

Eugene Pupov is likely not a real person. Someone did, however, create a Google account with the email address to create the fake “Google Docs” app. I suspect the FBI will track down the real perpetrator in short order. Google surely logs the IP addresses of everyone that creates a Google Developer account, which would have been necessary to create the fake app.

What are the best and worst case scenarios if you granted access to the fake Google Docs app?

It looks like Google has now removed the app, so if you haven’t fallen victim yet, you’re probably safe. If you did grant access though, even for a short time, it’s possible that the hacker retrieved the entire contents of your Gmail account and Contacts. In my expert opinion though, it’s unlikely that the attacker is planning on using that data in a malicious way. So, for example, if you have passwords and bank account logins stored in your email account, as many people do as a means of remembering and being able to search for their own logins, it’s likely harm won’t come your way, simply because that’s not the intent of most hackers. Most hackers just want to see if they can get away with perpetrating a scam. And, every major organization is now on high alert and will be looking for suspicious logins because of the pervasiveness of this news story.

How was this possible in the first place?

Any software developer can build an app which connects to users’ Google accounts and manages data. In fact, GMass is one such app, as is my other Gmail extension, Wordzen. One simply needs to create an app on the Google Developers Console, create an OAuth 2.0 sign-in, and get people to click a link that grants OAuth 2.0 access from the app to your Google account. The developer can specify what permissions he wants his app to request, and in this case, the fake Google Docs app requested permissions to manage your mail and manage your Contacts. A similar widespread story broke last week, when it was revealed that was selling user data to Uber. accesses your Gmail account using the same OAuth 2.0 mechanism that this malicious app does.

More Resources

Every major tech blog is covering this story today, however, none are doing it as thoroughly as I have in my post! Still though, read more about the scam on Gizmodo, TechCrunch, and The Verge.


Update 3:46 PM CST: Google has removed the app. Meaning, if you haven’t already been tricked, you are safe, unless a copycat app emerges.

Update 4:14 PM CST: If you received the email in your Gmail or G Suite account, Google is now flagging the message as dangerous and has disabled the link.

Update 4:46 PM CST: 29 minutes ago Google made an official statement on the issue stating they have rectified the issue:

You now have more control over your account’s bounce list and how bounces are handled for your account. GMass’s reply management system automatically processes all incoming email after you send an email campaign, and categorizes bounces, unsubscribes, real replies, and even block notifications. By default, addresses that bounce, where the bounce message indicates a legitimately bad email address, are placed on an internal “bounce list” for your account. Future GMass campaigns are suppressed against your account’s bounce list to prevent you from sending future emails to addresses that have bounced in the past.

There may be cases, however, when you want to continue to send to bounced addresses. For example, if you’re a low volume mailer sending to just personal contacts, and an email address continues to be placed on your bounce list that you know to be legitimate, you may want to have your campaigns ignore bounces.

If you don’t want to have your campaigns ignore bounces, meaning you DO want your campaigns to suppress the addresses on your bounce list, you may want to delete one or more addresses from your bounce list. Sometimes email addresses can inadvertently end up on your bounce list even though they are legitimate. For example, if an address blocks you, but GMass detects it as a legitimate bounce instead of a block, then you will want to remove it from your bounce list. If you’ve configured your Gmail account to send via an alias address through an external SMTP server, and your SMTP server is misconfigured and bounces all of your addresses, you may want to clear out your entire bounce list. These are just examples, but there are lots of reasons you may want to delete some or all of your bounced email addresses.

Now you can do all of these things…

To have your campaigns ignore your bounce list

  1. Click Compose to launch a new window.
  2. Set the To field to
  3. Set the Subject to the word ignore.
  4. Leave the Message blank.
  5. Hit the GMass button. Do not hit the Send button.

To clear out your bounce list of all addresses

  1. Click Compose to launch a new window.
  2. Set the To field to
  3. Set the Subject to the word deleteall.
  4. Leave the Message blank.
  5. Hit the GMass button. Do not hit the Send button.

To clear out your bounce list of just certain addresses

  1. Click Compose to launch a new window.
  2. Set the To field to
  3. Set the Subject to the word deletesome.
  4. In the Message area, enter a list of addresses, one on each line, that you wish to delete from your Bounce list.
  5. Hit the GMass button. Do not hit the Send button.

Which option should you choose?

If you set your account to ignore bounces, then you don’t need to worry about ever deleting addresses from your bounce list, because your bounce list will now be irrelevant. Your future campaigns won’t use your bounce list to exclude recipients, so you don’t need to care what addresses end up on your bounce list.

You would only need to ever remove an address from your bounce list if your campaign is using the default setting of NOT ignoring your bounce list.

Additional Information

GMass filters all bounces under the GMass Reports –> Bounces Label. Here you can see the actual bounce notification received by Gmail. Note that simply deleting a message from the “Bounces” Label has no effect on your account’s bounce list. Deleting a message from the “Bounces” Label will NOT delete the corresponding bounced address from your account’s bounce list.

Today I’m proud to introduce the world’s first mail merge service with live email proofreading. Before you send your Gmail mail merge campaign, you can now have a live English expert correct and improve your email content with the click of a button. No other email marketing or mail merge platform offers this. GMass is launching a revolution to perfect your email marketing content.

See the demonstration below, using an example email that everyone has seen — a Nigerian 419 scam email:

Mail Merge with Live Proofreading Animation
A demonstration of the GMass live proofreading feature. Click the animation for a closer look at what’s happening.

Before hitting the GMass button to send your mail merge campaign, just click the Proofreading button. My email proofreaders are standing by 24 hours a day Monday through Friday, and sporadically on the weekends. A proofreader will correct any spelling, punctuation, grammar, and mechanical errors, as well as improve word choice, sentence structure, rhythm, and organization.

Your email campaign will be handled in about ten minutes. Every GMass account gets THREE FREE proofreading submissions. We want you to use the proofreading service so you can see just how awesome it is! After that, the cost is $3.95 (USD) per proofreading submission.

After proofreading is complete, click the Differences button to see red/green markup showing exactly what was changed.

Perfect English in your email campaigns will:

  1. Generate a higher response rate from your prospects
  2. Convey that you’re intelligent and in command of your communication
  3. Make you the envy of email marketers around the world

Frequently Asked Questions

Q: My English is pretty strong, and I already write good emails. Should I still use this service?

A: In most cases, our team of English experts can find at least a few elements to improve in an email campaign. Even if you’re already a good writer, there’s a good chance that the GMass proofreaders will find room for improvement.

Q: I already use Grammarly to check my emails. Why do I need your proofreading service?

A: Grammarly is a great plugin for checking the mechanics of an email, and our proofreaders actually use it as a double check to catch spelling mistakes. It, however, is far from perfect, and oftentimes, its suggestions miss the mark. Grammarly can’t offer what a live proofreader can in terms of substituting stale words with more meaningful ones, and helping reorganize content so that your sentences read well and sound amazing. The proofreader’s goal is to make your emails perfect.

Q: How long will it take to proofread my email?

A: About ten minutes! When your email is ready, you’ll get an email notification that the proofreading is complete.

Q: My emails aren’t in English. Can I still use the proofreading service?

A: Not at this time. For now our proofreaders can only edit emails in English.

Q: When are the proofreaders available?

A: Proofreaders are standing by 24 hours a day, Monday through Friday, CST time (Chicago time). Proofreading is also done sporadically on the weekends, but may take longer than 10 minutes.

Q: Can the proofreaders fix my links or optimize my images, in addition to improving my English?

A: Right now the editors are focusing on improving your language, but in the future, we may train them to fix links, optimize images, and even fully design your email campaigns.

Q: Who are the proofreaders? Are they overseas?

A: No, all of our editors are based in the United States and are native English writers and speakers. They actually work for GMass’s sister service, Wordzen, which is an email writing and proofreading service.

Q: Who is eligible to use the proofreading service?

A: All GMass accounts are allowed three free email proofreadings. Afterward, we’ll bill you $3.95 USD for each email you submit for proofreading. After your first three, you must be a paying subscriber to continue to use the proofreading service, since only then will we have your credit card on file to bill you.

Q: What if the proofreader doesn’t find anything to correct or improve in my email?

A: Then the proofreader will inform you of that, and you won’t be billed and it won’t count against your proofreading allotment.

Q: How will I know what the proofreader changed?

A: After proofreading is complete, just click the GMass Settings arrow, and you can toggle between the Before, Differences, and After views. The Differences view has a red/green markup showing exactly what’s been changed. The After view is the final proofread email that should be ready to send. The Before view is your original version, before any edits were made.