Send mail server, e-mail transmission method, send mail program, e-mail how to change, and, e-mail change program

摘要

mail transmission server (10) receives an e-mail in which at least one destination address is set by the client, and transmits the email to the destination address domains with the assigned mail receiving server . Mail transmission server, at least one destination address, in the case of having a domain other than the predetermined validation unwanted domain group including the own domain is a domain that is assigned to it, the verification value of the verification header field of predetermined It was allowed to send to the e-mail mail receiving server of the time, including the information, on the other hand, sending the value of the verification header field to prohibit the transmission to the e-mail mail receiving server of the time that does not contain the information for verification control section provided with a (131).