After admin approval the inbox opens inside the store dashboard: inbox, sent, compose, reply, labels, and an optional customer link. The address is [email protected]. Platform mail stays [email protected] and is not the store mailbox.
Use is commercial for your shop only: customers, orders, complaints, invoices. Spam, fraud and impersonation are forbidden. Superadmin can disable the mailbox immediately on breach; send and receive stop until it is re-enabled. Gmail messages arrive after inbound domain routing is linked.