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encrypted-attachments

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xsukax / XMail

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A self-hosted, federated, zero-knowledge encrypted mail system in a single PHP file. AES-256-GCM encryption, PBKDF2 key derivation, and encrypted attachments ensure the server never sees your message password. No SMTP. No external dependencies. Just drop xmail.php and go.

pbkdf2 encrypted-email mail-server php-mail php-encryption zero-knowledge end-to-end-encryption aes-256-gcm secure-messaging single-file-app zero-knowledge-encryption xmail self-hosted-email self-hosted-mail federated-messaging privacy-email sqlite-mail encrypted-attachments federated-email open-source-mail
  • Updated Feb 24, 2026
  • PHP

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