Plugin: https://fluentsmtp.com/
Docs: https://fluentsmtp.com/docs/
> Go to plugins > Add New Plugin > FluentSMTP > Install > Activate.
> Select "Configure FluentSMTP"
> Select Google Workspace.
> Sender settings
> From Email: bruce@drbrucehoward.com
> From Name: Dr. Bruce Howard
> Set the return-path to match the From Email (Check)
> Force Sender Name (Check)
> Gmail / Google Workspace API Settings (Documentation)
https://fluentsmtp.com/docs/connect-gmail-or-google-workspace-emails-with-fluentsmtp/
> Obtain Google Cloud Application Client ID & Client Secret
> Sign into Bruce's email
> Sign into Bruce's Google Cloud account
> Select a project > New project
> Project name: FluentCRM Email Deliverability
> Location: drbrucehoward
> Create
> Select the project
> Search for Gmail API > Enable
> Select "Enable APIs & services"
> Select "+ Enable APIs and services"
> Select the "Gmail API"
> Select "Create credentials" (upper right button)
> Credential Type > Select an API > Gmail API > User data > Next
> OAuth Consent Screen
> App name: FluentCRM-drbrucehoward.com
> User support email: bruce@drbrucehoward.com
> Save and continue
> Scopes > Save and continue
> OAuth Client ID
> Application type > Web application
> Name > Fluent SMTP
> Create
> Your Credentials > Done
> Go to OAuth consent screen (left hand menu)
> Audience > Make external > In production > Confirm
> Go to Clients
> Add Authorized redirect URLs > https://fluentsmtp.com/gapi/
> Copy Client ID (paste into Fulent SMTP settings)
> Copy Client Secret (paste into Fulent SMTP settings)
> In Fluent SMTP > Select "Authenticate with Google & Get Access Token"
> Select correct email account and allow access
> Copy code & paste it into the Access Token > Save Connection Settings