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A way to filter spam emails

An e-mail and mail technology, applied in the field of e-mail, can solve the problems of reducing user quality and inability to filter spam, and achieve the effect of improving quality and efficiency

Active Publication Date: 2021-03-30
GUANGDONG EFLYCLOUD COMPUTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the mailbox server does not have a good filtering and fire protection strategy, the user will receive a large number of useless emails, which will reduce the quality of the emails received by the user
Moreover, there is a difference between spam and virus mail, and some spam cannot be filtered out by the mail filtering module

Method used

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  • A way to filter spam emails

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specific Embodiment approach

[0023] Step 1, the mail receiving server receives the email, judges whether the server IP address, MX record and TXT record of the mail are legal, if legal, saves the server IP address, MX record and TXT record, and enters step 2; otherwise discards the mail;

[0024] The condition for judging whether the email is legitimate is: by querying the DNS server,

[0025] 1) Determine whether the email domain name corresponds to an IP address;

[0026] 2) Determine whether the email domain name has a matching MX record;

[0027] 3) Determine whether the TXT record of the email domain name exists;

[0028] 4) The IP address obtained by analyzing the email domain name is then reversely analyzed by PTR to determine whether it is consistent with the domain name of the email sending server;

[0029] If the above conditions are met, it is judged as a legitimate email, and enter step 2;

[0030] In step 1, the trust degree policy is also added:

[0031] 1) Form a record information data...

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Abstract

The invention discloses a method for filtering junk e-mails, comprising the steps of: S1, judging the legality of the mail server IP address, MX record and TXT record; S2, judging whether the number of mails sent in a certain period reaches a threshold; S3, Through the periodical limit, add the delay calculation, and after a delay period, receive the mail from the IP again. The present invention verifies the legitimacy of the email sender's IP address and domain name records by adopting double filtering, and further filters the number of emails within a period of time for the filtered IP, thereby limiting the mailboxes that bypass the IP address and domain name records The server sends a large amount of spam, and by adding a punitive delay, it reduces the unnecessary spam received by the end user, improves the quality of the mail received by the user, and thus improves the efficiency of the user's work.

Description

technical field [0001] The invention relates to the field of emails, in particular to a method for filtering spam emails. Background technique [0002] Mail service is already a daily office and a common communication tool. With the development of e-mail technology, many merchants will send a large number of advertisement e-mails to a large number of end users through e-mail. If the mailbox server does not have a good filtering and fire protection strategy, the user will receive a large number of useless emails, which will reduce the quality of the emails received by the user. Moreover, there is a difference between spam and virus mail, and some spam cannot be filtered out by the filtering module of the mail. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for filtering spam emails, the purpose of which is to filter junk emails at the mail receiving server. [0004] The technical scheme adopted i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/58
CPCH04L51/42H04L51/212
Inventor 曾宪力黄日良罗楚然范裕
Owner GUANGDONG EFLYCLOUD COMPUTING CO LTD
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