Systems and methods for blocking unsolicited electronic mail messages
US8423618B1 · kind B1 · utility
5Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2010 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Mar 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/6418
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The spam blocker monitors the SMTP/TCP/IP conversation between a sending message transfer agent MTA—0 and a receiving message transfer agent MTA—1; catches MTA—0's IP address IP—0, MTA—0's declared domain D—0, from-address A—0; to-address A—1, and the body of the message; and uses this source and content information to test for unsolicited messages. It alters the conversation to reject, divert or intercept the message if the message is suspected of being unsolicited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.