System and method for filtering electronic messages using business heuristics

• US 7,647,321 B2
• Filed: 04/26/2004
• Issued: 01/12/2010
• Est. Priority Date: 04/26/2004
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google Inc. (Alphabet Inc.)
• Inventors: Petry, Scott M., Lund, Peter K., Titus, Jason H.
• Primary Examiner(s): Wong; Leslie
• Application Number:
  US10/832,407
• Publication Number:
  US 20050240617A1
• Time in Patent Office: 2,087 Days
• Field of Search: 707 5- 7, 707/10, 707/104.1, 707/E17.059, 709/203, 709/206, 709/219, 726 27- 30
• US Class Current: 709/206
• CPC Class Codes: G06Q 10/107 Computer-aided management of electronic mailing [e-mailing]
• CPC Class Codes: H04L 51/212 using filtering or selective blocking

Abstract

Disclosed are systems and methods for use in filtering electronic messages using business heuristics. In one aspect, a method includes determining whether the electronic message is associated with a desirable business, and adjusting the likelihood of delivering the electronic message to an intended recipient of the message if the electronic message is determined to be associated with the desirable business. In a more specific embodiment, the method further includes assigning a spam-score to the electronic message based on a likelihood that the electronic message is not unwanted by the intended recipient, blocking delivery of the electronic message to the intended recipient when the spam-score does not cross an overall threshold, and delivering the electronic message to the intended recipient based on the adjusted likelihood when the electronic message is determined to be associated with the desirable business.

Claims

1. A method of filtering an electronic message using business heuristics, the method comprising:

receiving an electronic message at a message management server operating on a computer network;

examining, using a message handler associated with the management server, the electronic message for characteristics indicative of its desirability or undesirability to an intended recipient of the electronic message;

establishing, with the message handler and based on the examination, a likelihood that delivery of the electronic message to the intended recipient should be blocked;

determining whether the electronic message is associated with a desirable business using one or more heuristics modules associated with the message handler; and

automatically decreasing, with the message handler, the likelihood that delivery of the electronic message to the intended recipient should be blocked if the electronic message is determined to be associated with the desirable business.

2. A method according to claim 1, wherein establishing a likelihood that delivery of the electronic message to the intended recipient should be blocked comprises assigning a spam-score to the electronic message based on the examination, and wherein decreasing the likelihood that delivery of the electronic message should be blocked comprises adjusting the spam-score, the method further comprising blocking or delivering the electronic message to the intended recipient according to a comparison of the adjusted spam-score to an overall threshold.

3. A method according to claim 2, wherein blocking or delivering the electronic message further comprises blocking delivery of the electronic message to the intended recipient when the adjusted spam-score does not exceed the overall threshold.

4. A method according to claim 1, wherein establishing a likelihood that delivery of the electronic message to the intended recipient should be blocked comprises assigning a spam-score to the electronic message based on the examination, and wherein decreasing the likelihood that delivery of the electronic message should be blocked comprises adjusting an overall threshold, the method further comprising blocking or delivering the electronic message to the intended recipient according to a comparison of the spam-score to the adjusted overall threshold.

5. A method according to claim 1, wherein the determining comprises determining whether the source of the electronic message is associated with the desirable business, the adjusting further comprising adjusting the likelihood of blocking delivery of the electronic message to the intended recipient if the source of the electronic message is determined to be associated with the desirable business.

6. A method according to claim 5, wherein the decreasing the likelihood that delivery of the electronic message should be blocked further comprises decreasing an overall threshold to accomplish delivery of the message if the source of the electronic message is determined to be associated with the desirable business.

7. A method according to claim 5, wherein the source comprises an Internet Protocol (IP) address of a sending server of the electronic message.

8. A method according to claim 7, wherein determining whether the source is related to the desirable business comprises one or more of comparing the IP address of the source to at least one of an IP address of the intended recipient, comparing prior connection attempts by the source IP address to the intended recipient, comparing prior message traffic between the source IP address and the intended recipient, comparing prior message traffic between the source IP address and other intended recipients within the business, or determining if the source IP address is assigned to be related to a particular business through external verification processes.

9. A method according to claim 1, wherein determining comprises determining the presence of business content in the electronic message likely to be used by the desirable business, the decreasing further comprising decreasing the likelihood that delivery of the electronic message to the intended recipient should be blocked if the business content is determined to be present in the electronic message.

10. A method according to claim 9, wherein establishing a likelihood that delivery of the electronic message to the intended recipient should be blocked comprises assigning a spam-score to the electronic message based on the examination, the method further comprising:

creating an effective threshold by adjusting an overall threshold based on the presence of the business content, and

blocking delivery of the electronic message to the intended recipient if the spam-score does not cross the effective threshold.

11. A method according to claim 9, further comprising establishing a business threshold to govern the determining of the presence of business content.

12. A method according to claim 11, further comprising creating an effective threshold by adjusting an overall threshold by an amount proportional to an amount of the business threshold.

13. A method according to claim 11, wherein the amount of the business threshold is established by an administrator of the method of filtering for the intended recipient.

14. A method according to claim 10, further comprising determining the presence of offending content in the electronic message corresponding to at least one base threshold, the presence of the offending content adjusting the overall threshold prior to creating the effective threshold.

15. A method according to claim 14, wherein the amount of the at least one base threshold is established by the intended recipient of the electronic message.

16. A method according to claim 14, wherein the at least one base threshold is a content-based tolerance of electronic messages associated with categories selected from the group consisting of sexually explicit content, get-rich-quick content, special-offers content, and racially insensitive content.

17. A method according to claim 14, further comprising adjusting the overall threshold by an amount proportional to an amount of the at least one base threshold.

18. A method according to claim 10, wherein the overall threshold is established by the intended recipient of the electronic message.

19. A method according to claim 1, wherein the desirable business is selected from the group consisting of the legal profession and financial professions.

20. A method according to claim 1, wherein the intended recipient is associated with the desirable business.

21. A computer-readable storage medium containing a set of instructions executable by a computer for performing the process of:

examining an electronic message for characteristics indicative of its desirability or undesirability to an intended recipient of the electronic message;

calculating, based on the examination, a likelihood that delivery of the electronic message to the intended recipient should be blocked;

determining whether the electronic message is associated with a desirable business; and

automatically decreasing the calculated likelihood that delivery of the electronic message to the intended recipient should be blocked if the electronic message is determined to be associated with the desirable business.

22. A computer-readable storage medium according to claim 21, wherein establishing a likelihood that delivery of the electronic message to the intended recipient should be blocked comprises assigning a spam-score to the electronic message based on the examination, and wherein decreasing the likelihood that delivery of the electronic message should be blocked comprises adjusting the spam-score, the method further comprising blocking or delivering the electronic message to the intended recipient according to a comparison of the adjusted spam-score to an overall threshold.

23. A computer-readable storage medium according to claim 22, wherein blocking or delivering the electronic message further comprises blocking delivery of the electronic message to the intended recipient when the adjusted spam-score does not exceed the overall threshold.

24. A computer-readable storage medium according to claim 21, wherein establishing a likelihood that delivery of the electronic message to the intended recipient should be blocked comprises assigning a spam-score to the electronic message based on the examination, and wherein decreasing the likelihood that delivery of the electronic message should be blocked comprises adjusting an overall threshold, the method further comprising blocking or delivering the electronic message to the intended recipient according to a comparison of the spam-score to the adjusted overall threshold.

25. A computer-readable storage medium according to claim 21, wherein the determining comprises determining whether the source of the electronic message is associated with the desirable business, the adjusting further comprising adjusting the likelihood of blocking delivery of the electronic message to the intended recipient if the source of the electronic message is determined to be associated with the desirable business.

26. A computer-readable storage medium according to claim 25, wherein the decreasing the likelihood that delivery of the electronic message should be blocked further comprises decreasing an overall threshold to accomplish delivery of the message if the source of the electronic message is determined to be associated with the desirable business.

27. A computer-readable storage medium according to claim 25, wherein the source comprises an Internet Protocol (IP) address of a sending server of the electronic message.

28. A computer-readable storage medium according to claim 27, wherein determining whether the source is related to the desirable business comprises one or more of comparing the IP address of the source to at least one of an IP address of the intended recipient, comparing prior connection attempts by the source IP address to the intended recipient, comparing prior message traffic between the source IP address and the intended recipient, comparing prior message traffic between the source IP address and other intended recipients within the business, or determining if the source IP address is assigned to be related to a particular business through external verification processes.

29. A computer-readable storage medium according to claim 21, wherein determining comprises determining the presence of business content in the electronic message likely to be used by the desirable business, the decreasing further comprising decreasing the likelihood that delivery of the electronic message to the intended recipient should be blocked if the business content is determined to be present in the electronic message.

30. A computer-readable storage medium according to claim 29, wherein establishing a likelihood that delivery of the electronic message to the intended recipient should be blocked comprises assigning a spam-score to the electronic message based on the examination, the method further comprising:

creating an effective threshold by adjusting an overall threshold based on the presence of the business content, and

blocking delivery of the electronic message to the intended recipient if the spam-score does not cross the effective threshold.

31. A computer-readable storage medium according to claim 29, further comprising establishing a business threshold to govern the determining of the presence of business content.

32. A computer-readable storage medium according to claim 31, further comprising creating an effective threshold by adjusting an overall threshold by an amount proportional to an amount of the business threshold.

33. A computer-readable storage medium according to claim 31, wherein the amount of the business threshold is established by an administrator of the method of filtering for the intended recipient.

34. A computer-readable storage medium according to claim 30, further comprising determining the presence of offending content in the electronic message corresponding to at least one base threshold, the presence of the offending content adjusting the overall threshold prior to creating the effective threshold.

35. A computer-readable storage medium according to claim 34, wherein the amount of the at least one base threshold is established by the intended recipient of the electronic message.

36. A computer-readable storage medium according to claim 34, wherein the at least one base threshold is a content-based tolerance of electronic messages associated with categories selected from the group consisting of sexually explicit content, get-rich-quick content, special-offers content, and racially insensitive content.

37. A computer-readable storage medium according to claim 34, further comprising adjusting the overall threshold by an amount proportional to an amount of the at least one base threshold.

38. A computer-readable storage medium according to claim 30, wherein the overall threshold is established by the intended recipient of the electronic message.

39. A computer-readable storage medium according to claim 21, wherein the desirable business is selected from the group consisting of the legal profession and financial professions.

40. A computer-readable storage medium according to claim 21, wherein the intended recipient is associated with the desirable business.