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Welcome to our Frequently Asked Questions (FAQ) page! If you haven't find your question in this page, please contact us.

General information

Which applications can Mergo replace?

This add-on can be used to send mail merge / email campaigns via Gmail & Google Sheets.

This is a tool similar to YAMM, Mailmeteor and a few others available on the G Suite Marketplace.

About the quota

How many emails can I send each day?

Your daily quota depends on the account type you are using:

  • Up to 500 emails per day for a Gmail account

  • Up to 2,000 emails per day for a Google Workspace (formerly GSuite) account

Why is my quota lower than expected?

There are several factors that could significantly affect your daily quota. We’re going to discuss all of them and recommend ways on how to remedy them.

Read this article to learn more.

Can I increase my quota?

No, that is the quota offered by Google services.

You can learn more about this by reading Quotas for Google Services.

What happens if my quota expires during a campaign?

No worries!

You can still continue your campaign even if your daily quota ran out.

Mergo will regularly check your quota and resume it as soon as your quota resets the next day (usually at midnight Pacific time)

Campaign sheet & Google Sheets file

Can I use multiple campaign sheets in a single Google Sheets file?

The ideal setup would be 1 campaign sheet (sheet or tab) for 1 Google Sheets file. But you can use multiple sheets or tabs in a single Google Sheets file as well (like in our example below).

If you're going to use multiple sheets, you need to Refresh the Mergo sidebar each time you run a campaign on another sheet/tab. This ensures that Mergo is referencing the correct campaign sheet (datasource). To do this, just click the relevant sheet/tab > Mergo actions > Refresh.

📌Note: By default, Mergo will always reference the 1st sheet/tab of a Google Sheets file as the datasource. This is why it's important to Refresh the Mergo sidebar each time you move to a different sheet/tab.

Remember: Not to hide a sheet/tab in your Google Sheets file. This may disrupt Mergo's ability to reference the correct fields (header labels).

How to choose the relevant sheet if I have multiple sheets (tab) in a Google Sheets file?

If you're using the Mergo add-ons for Google Docs or Gmail and you have multiple sheets or tabs in your Google Sheets file, you can easily choose the relevant sheets (tab) for your campaign sheet using Mergo. To do this inside the Mail Merge page, click the Import recipients from Sheets / Excel button (1) > Choose the relevant file then click Select (2) > select the relevant sheets (tab) > SAVE (3).




Will my campaign keep running if I delete my Sheets?

Your campaign will continue to run only if you removed it (put the campaign sheet file in Google Drive's Trash). But your campaign will stop running when:

  • Campaign sheets that have been in your Drive's Trash for more than 30 days are automatically & permanently deleted by Google.

  • You click the Empty trash button

📌Note: If you've only removed the campaign sheet, you can restore it from the Trash. Then open Mergo > click ABORT to stop the campaign.

💡Tip: If you only need to stop an ongoing campaign, just click on the ABORT button.

Can I set several scheduled campaigns from the same spreadsheet?

Yes you can. You can set up one campaign per sheet! You can learn more about this here.

How Mergo's tags/labels in Gmail are created?

Mergo will create labels for your emails in order to easily track your campain in your mailbox!

The first category is your spreadsheet name, and the nested one is your sheet name.

Merge tags & formatting

Why my merge tags aren’t replaced?

If your merge tags aren’t filled with your campaign sheet data, it might be due to the formatting of your Gmail draft.

To avoid this issue, just select the relevant tags and clear all formatting.

You can then send an email to yourself to make sure that your draft is perfect!

Why are my merge tags filled with the wrong data?

If your tags are filled with the wrong data, there is probably a shift in your campaign sheet. This can be caused by a “0” in a header that makes Mergo skip the column and create an unwanted shift.

To make sure this problem doesn’t happen, we highly recommend being careful if you use formulas in the headers of your Sheets (e.g., ArrayFormula).

Can I use formatting in my emails?


You can change the font, font color, background color, and table color of your email content - including your merge tags. They will still be merged by Mergo while retaining the formatting you used!

{{Merge tag}}

But be careful, if you are using another editor other than Gmail in writing your template, please make sure that there are no invisible HTML tags that could prevent Mergo from merging your data! To do so, you can simply send an email to yourself, and ensure your tags are merged.

Can I send HTML emails with Mergo?

Yes, you can send HTML-formatted emails with Mergo!

Simply paste your HTML code in a Gmail draft, and set it as Plain text mode. Mergo will then compute your code and replace the merge tags if there are any.

About the unsubscribe feature

What happens when recipients unsubscribe? Are they automatically skipped by Mergo?

The new Unsubscribed feature now automatically excludes all your unsubscribed recipients from the mailing queue. That is, they won’t be included in your future email campaigns.

This process is initialized when you try to send emails to someone who already clicked the Unsubscribe link (already added to our Unsubscribed database). The next time you attempt to send an email to them, their status changes to Already Unsubscribed - giving the prompt that you attempted to send an email to an already unsubscribed client.

Mergo will then skip all rows that have the Already Unsubscribed status. That is, it will not send emails to rows with this status (since the recipient specified that they didn't want to receive any emails from the sender).

You will see the details of your campaign metrics and Not Sent emails in the Mergo in the sidebar. You can also manage your unsubscribed recipients directly from the sidebar.

Learn more about this by reading our Enhanced Unsubscribed Features.

Campaign Metrics / Tracking Tool

Why is the Merge status still showing "SENT" even though my recipients already opened their emails?

Mergo's Campaign Tracking tool works by adding a *tracking pixel within each email you send. A *tracking pixel is a 1x1 pixel image that is invisible to the recipients, and will only be loaded when the recipient opens the email. When the tracking pixel is loaded, Mergo receives this information and adds it to the open tracking report.

This method is used by other email marketing tools and should be expected to work - always. But there are reasons why the tracker won't yield the expected result:

1. The main reason is usually caused by browser tracking blockers (like Ghostery, Privacy Badger, DuckDuckGo, Adblock Plus).

Recommendation: Check if you and your recipients using any of these. If yes, please try disabling them temporarily (or use Incognito mode or Safe Browsing) so we can isolate the problem.

2. Sometimes, your browser doesn't have the latest information and only displays a cached version.

Recommendation: Simply refresh the Campaign Tracking tool.

To do this while your relevant campaign sheet is open, click Campaign Tracking Report > Refresh.

3. Sending an email to a group of people will confuse the tracker. One person may have opened it, but not your intended recipient.

Recommendation: Send individual emails.

4. You are sending plain text emails - this will prevent any email tracking from coming through.

Recommendation: Send using HTML format.

In your Gmail draft, click More options > uncheck Plain text mode.

Why am I seeing too many "Opened", "Clicked" in the Tracking tool?

There will be instances where you (as the campaign sender) will see false-positive rates (open or click) in the Campaign Tracking tool. When this happens, it could mean that:

  • You opened the email(s) in your Sent folder in Gmail and clicked the links.

  • Your recipient(s) have an email server that automatically checks all the links and images (as part of their security system to check for spam, blacklisted accounts, phishing activities, ...) even before your recipient(s) could actually open it themselves. Technically, the email that you sent will be "opened" by their email security system before your recipient actually reads or opens it.