E-mail relay device, e-mail relay method, and non-transitory storage medium
US10341266B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2016 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Sep 18, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13095
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is an e-mail relay device including: an e-mail receiving unit that acquires an e-mail to be delivered before the e-mail reaches a transmission destination, the e-mail being transmitted from a transmission source mailer through simple mail transfer protocol (SMTP); a request notification unit that transmits, after the e-mail receiving unit acquires the e-mail to be delivered, a notification e-mail for allowing communication with a predetermined authentication server through IP by using a transmission source e-mail address of the e-mail to be delivered as a destination; a transmission source IP address acquisition unit that acquires, in a case where the transmission source terminal communicates with the predetermined authentication server after the notification e-mail is transmitted, an IP address of a transmission source terminal contained in an IP header of an IP packet transmitted/received during the communication; and a determination unit that determines the reliability of the e-mail to be delivered based on the IP address of the transmission source terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.