Access restriction device, access restriction method, computer readable storage medium

摘要

An access restriction device including a processor; and a memory. The processor executes: receiving an email from a transmission source; specifying including analyzing, when a file is attached to the email, information in the file, and specifying a character string from the file; executing including specifying, from a storing unit in which a character string is associated with an access restriction process, an access restriction process that is associated with the character string specified at the specifying the character string, and executing the specified access restriction process on the file; and sending including attaching, instead of the file attached to the email, the file that has been subjected to the access restriction process at the executing to the email, and sending the email to which the file subjected to the access restriction process is attached to a transmission destination of the email.