Abstract: By an email server, it becomes possible to perform a deletion process for an email transmitted by a sender according to sender's intention and thereby to delete the transmitted email based on that operation. An email deletion server (1) according to the present invention includes a deletion request information storage unit (1a) that stores identification information of an email and identification information of at least one receiver of that email, the email being requested to be deleted by a sender, and an email deletion processing unit (1D) that updates, for the email server, a process for deleting an email from a reception email area of the receiver based on the identification information of the email and the identification information of the receiver stored in the deletion request information storage unit (1a), the email being identified by the identification information of the email and the identification information of the receiver.