Hello! Thanks for your question. It's not a Web3 platform, but I would recommend using ProtonMail for a secure end-to-end email service. ProtonMail offers end-to-end encryption, which means that only the sender and recipient can read the content of the email. Additionally, ProtonMail stores all user data in a secure data center in Switzerland with strict data privacy laws. I hope this helps!

Some popular options include ProtonMail, Tutanota, and Hushmail. These providers offer end-to-end encryption, which means that only the sender and recipient can read the contents of the email.

I give my preference to using these two services - Mail3 and EtherMail. They are built on Web 3 technologies and perfectly cope with spam and phishing attacks, have an increase level of security and privacy compared to traditional email service providers.