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Google Workspace SMTP Relay: Setup, Ports, Auth, and Safe TestingResourceGW

March 3rd, 2026

Google Workspace SMTP Relay: Setup, Ports, Auth, and Safe Testing

Set up Google Workspace SMTP relay without confusing it with smtp.gmail.com. Learn when to use smtp-relay.gmail.com, which ports and auth modes apply, and how to validate relay changes safely.

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