Mail3 users could claim on-chain profile spaces to store their necessary public data for interoperation,
including static personal profile, PGP keys for encryption, LMPS selection, and so on. Furthermore, to
create more composable possibilities with other web3 protocols, Mail3 allows users to publish their
social connections, personal preference, and subscriptions in the profile space. The Mail3 protocol
supports decentralized domain service such as Ethereum Name Service as account alias, which
makes the addresses much more friendly and distinctive. With profile space and various
applications built on it, we shape the decentralized identity from the bottom up.