| 摘要 |
A mail filter device allowing processing time to be reduce is provided. The SMTP processor relays commands and responses exchanged between SMTP client and SMTP server and performs content check during message relaying. TCP/IP terminations share header information through a connection manager, keeping TCP/IP header information identical both between the SMTP client and the mail filter device and between the mail filter device and the SMTP server. When the content check determines that the electronic mail is relayed without discarding its message, the SMTP processor transfers a response to the SMTP client when the SMTP server has completed relay processing.
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