Sounds like you might be using the free Google email forwarding feature outlined at https://domains.google/get-started/email/ https://domains.google/get-started

Sounds like you might be using the free Google email forwarding feature outlined at https://domains.google/get-started/email/ https://domains.google/get-started/email/ To directly receive and send email from your custom domain Google upsells you to Google Workspaces https://domains.google/learn/how-to-use-email-forwarding/ https://domains.google/learn/how-to-use-email-forwarding/ Some other domain providers do offer email forwarding so its not exactly a Google exclusive.