The invention discloses a reverse-engineering-resistant safe E-mail forwarding system and method. The system comprises a secret mail re-encryption module and a re-encrypted mail recovery module, wherein the secret mail re-encryption module comprises a preprocessed parameter generating unit, a re-encryption tuple generating unit, a confused re-encryption processing unit and a re-encryption output unit; and the re-encrypted mail recovery module comprises a re-encrypted mail receiving unit, a re-encrypted mail decryption unit and an original mail searching unit. The method comprises an E-mail re-encryption method and an E-mail re-encryption recovery method. The reverse-engineering-resistant safe E-mail forwarding system and method have the characteristics of low realization complexity, high safety, recovery simplicity and the like and are suitable for re-encrypting and forwarding a mail through a third-party mail service provider under the conditions that the private keys of the original mail receiver and the mail agent receiver are not leaked, and any information of the mail is not leaked.