Interpret all permutations of an email address (period seperations, +filters)
Gmail will ignore periods in an email when it comes to rounding. So email@example.com and firstname.lastname@example.org will both go to the same address. Someone might want to use the email because it lets them filter those messages from within Gmail.
I tested it, and as of right now, haveibeenpwned sees them as seperate emails which may give users a false sense of security.
Develop a way to find all permutations of an email based off of their filterless email address.
Robert Headley commented
Ok, that works.
Thanks Robert, I know you've added a comment on the idea around searching when plus symbols are involved too, I'm going to add an edit to that one to include periods and close off this idea here as they're both very similar.