Google Workspace/ Gmail Mailer

Go to My Settings >  My Email -Sending Setup
From Email
This is the email address that all of your site’s emails will be sent from. You can type your email address into the field provided.
Mailer
This is where you can choose which mailer you’d like your site to use. Select the Google / Gmail option.

Once you’ve chosen this mailer, you should see a new section appear titled Google / Gmail. In this section, there are settings labeled Client ID and Client Secret.

To generate the information you need for these fields, you’ll need to use your Google account to create a web application.

In the new tab or window you’ve opened, log in to your Google account and open your Google Cloud Console.

If it’s your first time using Google Cloud Console, you may see a popup asking you to select your country and agree to the Terms of Service. Go ahead and do so, then click on AGREE AND CONTINUE to move on to the next step.

If you’ve logged in to the Google Cloud Console before, you’ll likely bypass the Terms of Service.
Creating or Choosing a Project
First, you’ll need to choose a project to use for your app. You can select an existing one or create a new one.

To do so, click on the projects dropdown in the toolbar at the top of your dashboard.

In the popup that appears, select an existing project from the list or click on New Project in the top right corner.

If you selected an existing project, move on to the next step. For a new project, enter a project name and select an organization and location from the dropdowns.

Then click on the CREATE button.
Enabling the Gmail API
Next, you need to enable the Gmail API for your project. In your Google Cloud Console sidebar, go to APIs & Services » Library.

Then look under Category and click on Email, or enter “Gmail API” in the search bar.

Click on the Gmail API result.

On the Gmail API page, click on the blue Enable button.
Creating Your Application’s Credentials
After you enable the Gmail API, you should be redirected to the Gmail API Overview page. Here, click on the CREATE CREDENTIALS button.

On the next page, Google will ask a few questions to determine the Credential Type you need. From the Select an API dropdown, choose Gmail API.

Note: If you don’t see an option for the Gmail API in the dropdown, be sure that you have the Gmail API enabled for your account.

Next, under What data will you be accessing?, select the User data option. Then click the NEXT button to proceed.
Configuring Your OAuth Consent Screen
Google will then ask for some basic information about your app.

This section is mostly for personal use since no one else will be using your app. However, some fields are still marked as required:

• App name: Enter an app name of your choice (e.g., Pattie’s App).
• User support email: Select your email address from the choices provided.
• App logo: If you’d like, you can upload a logo for your app. This is optional.

Finally, add your email address in the Email addresses field. Then click on the SAVE AND CONTINUE button to proceed to the next step.
Setting Up Your OAuth Client ID
Next, you’ll need to fill out some information about your OAuth Client ID.

From the Application type dropdown, select the Web application option. Once you do so, more fields will automatically populate.

You can leave the Name field as the default value or change it to something more relevant. For this example, we’ll keep the default name, Web client 1.

Next, skip the Authorized JavaScript origins section and scroll to Authorized redirect URIs.

Click on the + ADD URI button and input the following: https://connect.wpmailsmtp.com/google/.

Then click on the CREATE button to complete this step.

Once your app has been created, the Your Credentials section will expand to show you your Client ID. There’s no need to copy it now, as you’ll access it from another area in a later step.

Instead, go ahead and click the DONE button at the bottom of the page.

Google will put your app into Internal mode by default. It’s really important that you switch it to External mode and publish it. Otherwise, your app will be super limited and won’t function properly.

In your Google Cloud Console sidebar, go to APIs & Services » OAuth consent screen. Under User Type, click on the Make External button.

In the popup window that appears, select the In production option. Then click on CONFIRM.

Once confirmation is complete, you’ll see that your app’s Publishing status is now In production.

Next, click on Credentials in the left side menu.

Once you’re on the Credentials page, in the OAuth 2.0 Client IDs section you can see the details of the web application you just created. To view the Client ID and Client Secret, click the pencil icon.

This will open all of the details for your app. On the right side of this page, you’ll see the Client ID and Client secret values.

Go ahead and copy both of these values into the corresponding fields in your Mail SMTP settings.

Note: Be very careful not to copy any extra text or spaces with your Client ID or Client Secret, as this will result in an error in the next step.

Once you’ve added these values, click the Save Settings button at the bottom of the page.

After saving your settings, the page will refresh. You must grant permission before Google allows our plugin to use your Gmail API to send emails.

To do this, scroll to the bottom of the Mail SMTP settings page and click the button labeled Allow plugin to send emails using your Google account.

This will open a login screen for Google. Go ahead and log in to the account you’re setting up SMTP with.

Next, you’ll see a screen asking for permission for this site to send emails on your behalf.

When you’re ready, click the Allow button to proceed.
Bypassing Google’s Verification Warning (Free Gmail Users Only)
If you are connecting with a free Gmail account you might see the following screen. Go ahead and click on the Advanced link in the bottom left corner.

In the expanded section, click on Go to wpmailsmtp.com (unsafe). Don’t worry, Google only displays this warning because it hasn’t verified your app. There is no need to verify it since you created this app just for your own use.

Then click on the Allow button.