Have you tried using the Gmail “Send an Email” module?
Here’s how to set it up:
How to Connect and Use Google APIs in Make!
0. Prerequisites
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0.1. You need to have a Google accountMake sure you can sign in to Google Cloud Console with this. 
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0.2. Create a Google Cloud Platform (GCP) projectFollow this main help centre guide on How to set up a custom OAuth 2.0 custom app in Make. 
1. Enable Google APIs
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1.1. Enable the relevant APIs that you want to useSearch for the relevant Google API here: https://console.cloud.google.com/apis/library 
2. OAuth Client
Direct Link: https://console.cloud.google.com/apis/credentials
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2a. Create “OAuth client ID” Credentials
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2b. Insert all the Google Redirect URIs for your appInsert All Google Redirect URIsHere are some commonly-needed redirect URIs you need for your Google Cloud Console OAuth app. If you set these up, you can reuse the same GCP app for other Google apps and modules on Make. https://www.make.com/oauth/cb/oauth2 https://www.make.com/oauth/cb/google https://www.make.com/oauth/cb/google/ https://www.make.com/oauth/cb/google-custom https://www.make.com/oauth/cb/google-restricted https://www.make.com/oauth/cb/google-cloud-speech https://www.make.com/oauth/cb/google-search-console https://www.make.com/oauth/cb/google-analytics-4 https://www.make.com/oauth/cb/google-ads2 https://www.make.com/oauth/cb/google-ads2/ https://www.make.com/oauth/cb/youtube https://www.make.com/oauth/cb/chromeIncluding These Google Redirect URIsYou are also required to insert the legacy URLs below from the old Integromat system that not been migrated to Make yet (same as the above list, but replace “make” with “integromat”): https://www.integromat.com/oauth/cb/oauth2 https://www.integromat.com/oauth/cb/google https://www.integromat.com/oauth/cb/google/ https://www.integromat.com/oauth/cb/google-custom https://www.integromat.com/oauth/cb/google-restricted https://www.integromat.com/oauth/cb/google-cloud-speech https://www.integromat.com/oauth/cb/google-search-console https://www.integromat.com/oauth/cb/google-analytics-4 https://www.integromat.com/oauth/cb/google-ads2 https://www.integromat.com/oauth/cb/google-ads2/ https://www.integromat.com/oauth/cb/youtube https://www.integromat.com/oauth/cb/chromeNote 1: Due to inconsistencies in Make’s implementation of the connections, there are two separate entries where has one is googleand another ending in a forward slashgoogle/- you might need one or the other, so we have to use both!Note 2: Once you’ve set these up, you can use/reuse the same Google OAuth App ID + Secret for all the supported Google connections and modules on Make - you’ll just have to enable the relevant Google APIs! 
3. OAuth consent screen
Direct Link: https://console.cloud.google.com/apis/credentials/consent/edit
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3a. Insert Two Authorised Domains- 
Insert make.comandintegromat.com
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Fill in other required fields 
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Click “Save and Continue”. 
 
 
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3b. Add All Scopes- 
Click “Add or Remove Scopes” 
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Select 100 “Rows per page”, for each page, check all the rows, OR 
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Manually type in the scopes you need 
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Click “Update” at the bottom 
 
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3c. Step through and go to dashboardAt the last step/page, click “BACK TO DASHBOARD” instead of “Prepare for Verification” 
  
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3d. Publish your GCP OAuth2 appYou will need to set your OAuth application to “Production”, otherwise the credentials expire very frequently. - 
To do this, go back to “OAuth consent screen” 
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Then click the “PUBLISH APP” button 
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Then click the “CONFIRM” button 
 
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4. Create New Connection (HTTP, or respective Google module)
You can find the Client ID and Client Secret in the OAuth2 app you created in GCP, on the right-hand side of where you inserted the callback URLs in step 2:
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4a. Specific Google module (Sheets, Docs, Drive, Gmail, etc.)Insert the GCP app client ID and secret here BEFORE clicking “Sign in” (Gmail example) 
 OR, 
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4b. HTTP OAuth 2.0 Request moduleYou need a “Authorize Parameters” key of redirect_uriwith the above Make OAuth2 callback URL.
Related Topics:
Hope this helps! Let me know if there are any further questions or issues.
— @samliew









