Method and device for blocking mail behavior and gateway

Abstract

The invention discloses a method and a device for blocking a mail behavior and a gateway. The method for blocking the mail behavior comprises the following steps of: monitoring the mail operation of a client user; acquiring a user identifier in a simple mail transfer protocol (SMTP) instruction transmitted by a client of the user; judging whether the mail operation is out of right or not according to the user identifier and preset right corresponding to the user; and when the mail operation is out of the right, modifying mail response information or an authentication password, so that a mail server returns error information to the client, wherein the error information is used for instructing the client to abort the limited mail operation. According to the embodiment, the error information returned to the client is used for instructing the client to abort the limited mail operation, so that a limited user can be prevented from transmitting a mail. According to the method, a transmission control protocol (TCP) cannot be interrupted, so that the client cannot repeatedly establish connection, and the consumption of equipment is reduced.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on December 31, 2011, the application number is 201110459892.8, and the invention title is "email behavior blocking method, device and gateway", the entire content of which is incorporated herein by reference Applying. technical field [0002] The invention relates to the field of computer security management, in particular to a mail behavior blocking method, device and gateway. Background technique [0003] As the basic medium of daily communication, e-mail has become a key research field of application content security, including the management and control of application behavior of network resources. Specifically, in practical applications, for work reasons, it is sometimes necessary to control the user's permission to receive or send emails, for example: some users are only allowed to send emails, while some users are only allowed to receive emails. [0004...

AI Technical Summary

Problems solved by technology

[0009] Although disconnecting the TCP connection can block emails, the client using the SMTP / POP3 protocol will automatically re-establish the TCP connection after a short period of time, and will continue to try to continue sending emails, which will consume unnecessary resources on related devices , resulting in a waste of resources

Therefore, it is not a good blocking method to use the method of disconnecting the TCP connection.

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