How to Authorize Google to Allow SMTP

Need to authorize Google to allow SMTP email? Follow these steps:

Setting up Google Workspace SMTP Relay Service

Detailed instructions from Google Workspace Admin Help Docs can be found here.
  1. Go to Apps > Google Workspace > Gmail > Routing.
  1. Scroll to SMTP relay service.
  1. Select configure.
  1. Enter a description for the SMTP relay service (ex: SMTP for [software name] - [Your brand] Outbound Mail Integration).
  1. Under Allowed Senders, select "Only addresses in my domain".
  1. For Authentication, select Require SMTP Authentication.
  1. For Encryption, select Require TLS encryption.

If your G-Suite account uses 2-Step Verification

  1. Create an App Password.
  1. Go to your Google Account.
  1. Select Security.
  1. Under "Signing in to Google," select App Passwords. (You may need to sign in)
  1. At the bottom, choose Select app and choose “Other - custom name”.
  1. Enter NuMust Bond-[Your Brand].
  1. Select Generate.
  1. Copy the 16-character code and save it in a safe place.
Note: Most of the time, you’ll only have to enter an App password once per app or device, so don’t worry about memorizing it.

Add credentials to the Custom email server SMTP of this software

  1. Navigate to "White Label".
  1. Select "Custom email SMTP Server".
  1. Under SMTP Server enter: smtp-relay.gmail.com.
  1. For the Port, enter 587.
  1. For Encryption, select TLS.
  1. Select "SMTP Auth".
  1. For Auth Username, enter your full email address (yourname@yourdomain.com).
  1. For Auth Password, enter the 16-character code from above.
  1. Enter Sender/Reply-to Name and your Sender/Reply-to Email.
  1. Send Test email.
You're DONE!