SERVER, SERVICE METHOD, PROGRAM, AND INFORMATION RECORDING MEDIUM

To enable a user to easily read an electronic mail desirable for the user, regardless of a determination result by a spam email filter. In a server (101), a receiver (102) receives an electronic mail addressed to a user. A classifier (103) classifies an electronic mail into one of classes including first and second classes. A first storer (104) stores a first-class email classified into the first class in a mailbox (111) for reading assigned to the user. An acceptor (105) accepts a permission instruction from the user. A setter (106) sets a permission period including an instruction time when the permission instruction is accepted. An extractor (107) extracts a permitted email received at a reception time within the set permission period from second-class emails classified into the second class. A second storer (108) stores a notice email making a permitted email readable in the mailbox (111) for reading.