US 11,750,647 B2
Method and apparatus for user protection from external e-mail attack
Deepak Kumar, San Jose, CA (US); and Anshu Sharma, Los Altos, CA (US)
Assigned to Barracuda Networks, Inc., Campbell, CA (US)
Filed by Barracuda Networks, Inc., Campbell, CA (US)
Filed on Oct. 23, 2020, as Appl. No. 17/79,073.
Application 17/079,073 is a continuation of application No. 16/180,868, filed on Nov. 5, 2018, granted, now 10,834,129.
Prior Publication US 2021/0044620 A1, Feb. 11, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/40 (2022.01); H04L 51/212 (2022.01); G06F 3/0483 (2013.01); G06F 3/0482 (2013.01)
CPC H04L 63/1483 (2013.01) [H04L 51/212 (2022.05); G06F 3/0482 (2013.01); G06F 3/0483 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving a first e-mail at an e-mail client, the first e-mail having an addressee, the e-mail client being operable by and accessible to the addressee;
receiving a detection of a suspicious element in the first e-mail from a detection system;
flagging the first e-mail as suspicious with a first flag and a first warning level in response to receiving the detection;
flagging a second e-mail with a second flag and a second warning level;
displaying the first and second flags with explanatory text in a mailbox view of the e-mail client without opening the first and second e-mail for display to the user, the suspicious element not being selectable in the mailbox view; and
sorting the first and the second e-mail with other e-mails of the mailbox view based on the flag warning levels.