US 11,722,445 B2
Multi-computer system for detecting and controlling malicious email
Christopher D. Birch, Tega Cay, SC (US); Guy Vernon Pearson, Jr., Columbia, MD (US); and James R. Crocker, Charlotte, NC (US)
Assigned to Bank of America Corporation, Charlotte, NC (US)
Filed by Bank of America Corporation, Charlotte, NC (US)
Filed on Dec. 3, 2020, as Appl. No. 17/111,249.
Prior Publication US 2022/0182345 A1, Jun. 9, 2022
Int. Cl. H04L 51/212 (2022.01); H04L 51/08 (2022.01); H04L 9/40 (2022.01); H04L 51/48 (2022.01); H04L 51/214 (2022.01); H04L 61/4511 (2022.01)
CPC H04L 51/212 (2022.05) [H04L 51/08 (2013.01); H04L 51/214 (2022.05); H04L 51/48 (2022.05); H04L 61/4511 (2022.05); H04L 63/1433 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, by a computing device having a processor and memory, an email associated with an email domain;
determining, by the computing device, a registration date of the email domain;
comparing, by the computing device, the determined registration date to a first threshold date;
responsive to determining that the determined registration date is before the first threshold date, transmitting, by the computing device, the email to a recipient address identified in the email;
responsive to determining that the determined registration date is at or after the first threshold date, executing, by the computing device, a security risk assessment model, wherein the security risk assessment model comprises a second threshold date, and wherein the second threshold date is later than the first threshold date;
responsive to determining whether the determined registration date is at or after the second threshold date, determining, by the computing device, a security risk level of the email domain;
filtering, by the computing device and based on the security risk level of the email domain, the email; and
updating, based on a quantity of emails prevented from being transmitted to recipient addresses during a time period, the first threshold date and the second threshold date.