MetaMail is the web3 email provider. With MetaMail users use wallet/ENS as email address, and sign/encrypt to ensure the security. We are using KNN3's recommendation service to help users find their potential friends.
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During EthShanghai Hackathon, we are using KNN3's recommendation service to help users find their potential friends.
KNN3 provides a powerful yet easy-to-use service; The best part is that the recommendation algorithm is pluggable, and new recommendation methods can be used in the future as the project develops, or as the user prefers.