What should you do to ensure that internal messages do not go into Gmail spam while blocking spoofing attempts?

You are in the middle of migrating email from on-premises Microsoft Exchange to Google Workspace. Users that you have already migrated are complaining of messages from internal users going into spam folders.

What should you do to ensure that internal messages do not go into Gmail spam while blocking spoofing attempts?

A. Train users to click on Not Spam button for emails.

B. Add all users of your domain to an approved sender list.

C. Force TLS for your domain.

D. Ensure that your inbound gateway is configured with all of your Exchange server IP addresses.

Answer: D

Explanation:

When you are in the process of migrating from an on-premises Exchange server to Google Workspace, it’s essential to configure your inbound gateway settings correctly to ensure that emails from internal users do not get marked as spam. By adding the IP addresses of your Exchange servers to the inbound gateway configuration in Google Workspace, you help Gmail recognize those emails as legitimate and internal to the organization.

Other options:

A. Training users to click the "Not Spam" button is not a scalable or practical solution, as it puts the onus on individual users to manage what should be an automated process.

B. Adding all users of your domain to an approved sender list could potentially bypass some spam filters, but it wouldn’t be a good way to address the specific issue of emails from internal users (still on Exchange) being marked as spam. It also doesn’t directly tackle the problem of spoofing.

C. Forcing TLS (Transport Layer Security) for your domain will encrypt emails in transit, which is good for security but doesn’t directly address the issue of internal emails being marked as spam during the migration process.

Therefore, option D is the most direct and effective way to ensure that internal messages do not end up in Gmail spam folders while still maintaining the ability to block spoofing attempts.