| 摘要 |
PURPOSE:To attain the service established (such as personal advice and tax consultation) by remaining a sender anonymous by setting information used to control sender anonymity to a prescribed area of an electronic mail control information field. CONSTITUTION:An electronic mail system is built up by an electronic mail center 1 comprising a CPU 10, a storage device 11, and a line I/F 12 and by a terminal equipment 2. Then a sender terminal equipment 2 is able to set a command as to whether or not information (2) used to control sender anonymity is given to a prescribed area of a header (1) a of an electronic mail (1). When other terminal equipment 2 reads an arrived electronic mail from a mail box 110 of the electronic mail center 1, the center 1 checks a prescribed area of the header (1) a of the electronic mail (1). When the information (2) for sender anonymity is commanded, the center controls it that sender information (3) is not given to the destination terminal equipment 2.
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