How to enable gmail api to use as smtp server?

To enable the Gmail API to use as an SMTP server, you will need to follow these steps:

1. Create a Google Cloud Platform project
   • Go to the Google Cloud Console and create a new project.
   • Note down the project ID, as you will need it later.
2. Enable the Gmail API
   • Go to the API Library in the Google Cloud Console.
   • Search for “Gmail API” and click on it.
   • Click the “Enable” button to enable the API.
3. Create OAuth 2.0 credentials
   • Go to the “Credentials” page in the Google Cloud Console.
   • Click the “Create credentials” button and select “OAuth client ID”.
   • Choose “Web application” as the application type.
   • Enter a name for the OAuth client ID.
   • In the “Authorised redirect URIs” section, add the URL of the page that will be using the SMTP server.
   • Click the “Create” button to create the OAuth client ID.
   • Download the client secret JSON file for the OAuth client ID and save it in a secure location.
4. Authorise the API client
   • Follow the instructions on the Google Cloud Console to authorise the API client.
   • Use the OAuth client ID and secret to generate an access token.
   • Store the access token securely.
5. Configure your application to use the Gmail API as an SMTP server
   • Use an SMTP library in your preferred programming language to configure your application to use the Gmail API as an SMTP server.
   • Set the SMTP server to smtp.gmail.com.
   • Set the SMTP port to 587.
   • Set the SMTP authentication method to OAuth2.
   • Provide the OAuth client ID, client secret, and access token to the SMTP library.
6. Test your application
   • Send a test email using your application and ensure that it is delivered successfully.