| 摘要 |
PROBLEM TO BE SOLVED: To provide an e-mail repeater which is capable of effectively excluding spam mail without changing or invalidating a main address. SOLUTION: A main address 111 and a sub-address 112 are registered in a profile box 110. The sub-address 112 is constituted by combining a key 113 and the main address 111. When e-mail is transmitted to a relay server 100, its envelope part is received by an MTA (Mail Transfer Agent) 106. The MTA 106 determines which of the main address and the sub-address the e-mail is addressed to, on the basis of a transmission destination address of the envelope part. When it is addressed to the main address, relay permission determination processing (S5) is performed, and the data part of the permitted e-mail is received and is transferred to a mail server (S7). COPYRIGHT: (C)2008,JPO&INPIT
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