Method and system for one-way transmission of e-mail information between internal and external networks

Abstract

The invention discloses a method and system for one-way transmission of e-mail information between internal and external networks. The disclosed method includes: a mailbox account receiving an e-mail step: the mailbox server receives external and / or internal network e-mails, and stores the received e-mails in The storage space of the email account, under the intranet, log in to the email account and connect to the receiving email server, the receiving email server takes out the email from the storage space and sends it to the email account, the email account receives the email, and the email is received successfully; the email account sends email steps: Intranet Next, log in to the email account; create a new email to be sent or forward an email to be sent; determine whether the receiving email account is an external network email account, if not, send the email to the sending email server, wait for it to be received, and send the email successfully; otherwise, it is forbidden to send out. Failed to send mail. Realize the one-way network transmission of e-mail information in the external network, and the e-mail information in the internal network can be sent and received freely.

Description

technical field [0001] The invention relates to the technical field of network information security, in particular to a method and system for one-way transmission of e-mail information between internal and external networks. Background technique [0002] Network security is becoming more and more serious. Many companies adopt the isolation of internal and external networks, put important business systems on the internal network, and transmit information through the internal mailbox of the enterprise LAN without domain name registration. The basic data required by the business system is mainly transmitted through the electronic mailbox of the World Wide Web, that is, the information on the external network is transmitted through the electronic mailbox of the World Wide Web. On the Linux platform, it is currently implemented by building a mail repeater and DNS server and then forwarding mail. The problem with the current solution is that it is too complicated and costly: a ma...

AI Technical Summary

Problems solved by technology

The problem with the current solution is that it is too complicated and costly: a mail server is required as an internal mailbox server without domain name registration, a DNS server that realizes domain name access to internal mailboxes is used as an internal DNS server, and a mail relay as a mail forwarding server The server forwards the mail received by the mail repeater to the intranet mailbox account after querying the internal DNS server

In addition, there are two separate mail systems on the internal network and the external network. The internal network mailbox server has not registered a domain name, resulting in the inability of the external network mailbox to directly forward the mail to the internal network mailbox.

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