To provide an image forming method, capable of eliminating the need of an inquiry to a sender and performing the deciphering processing of mail, an image forming apparatus, a program and a recording medium.

The image forming apparatus is provided with a document control means for determining whether received electronic mail is ciphered and for keeping the electronic mail, when the electronic mail has been ciphered and an authentication means for determining whether it is a user who has the right of use. The document control means deciphers the electronic mail, corresponding to an authentication results.