how does checkers work?

[s3ft DF Member Posts:5 Threads:4 Reputation 0]

so ive seen alot of checkers online and I was wondering how it was made, and how it works.

if there is any good ones out there that are free, please list them.

[marcjj DF Member Posts:4 Threads:0 Reputation 0]

it basically tries to login a big list of emails, and the valid logins get saved to a new list.