Efficient mail filtering techniques
First Claim
Patent Images
1. A mail filter system comprising:
- a client device;
a server device; and
a mail filtering device for filtering electronic mails, at which an electronic mail is relayed between the client device and the server device, wherein the mail filtering device comprises;
a connection manager which registers header information before and after relaying the electronic mail, wherein header information established for one of the client-side connection and the server-side connection is used for the other one of the client-side connection and the server-side connection.
1 Assignment
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Accused Products
Abstract
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.
25 Citations
42 Claims
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1. A mail filter system comprising:
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a client device;
a server device; and
a mail filtering device for filtering electronic mails, at which an electronic mail is relayed between the client device and the server device, wherein the mail filtering device comprises;
a connection manager which registers header information before and after relaying the electronic mail, wherein header information established for one of the client-side connection and the server-side connection is used for the other one of the client-side connection and the server-side connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mail filter device for filtering electronic mails, at which an electronic mail is relayed between a client device and a server device, comprising;
a connection manager which registers header information before and after relaying the electronic mail, wherein header information established for one of the client-side connection and the server-side connection is used for the other one of the client-side connection and the server-side connection. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A mail filtering method for filtering electronic mails and relaying an electronic mail between a client device and a server device, comprising:
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registering header information before and after relaying the electronic mail; and
using header information established for one of the client-side connection and the server-side connection as header information for the other one of the client-side connection and the server-side connection. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A computer-readable program instructing a computer to filter electronic mails and relaying an electronic mail between a client device and a server device, the program comprising:
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registering header information before and after relaying the electronic mail; and
using header information established for one of the client-side connection and the server-side connection as header information for the other one of the client-side connection and the server-side connection. - View Dependent Claims (41, 42)
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Specification