This week I received several spam emails in my Gmail inbox. What unusual about them is most of them are not addressed to my Gmail email address, but to email addresses like firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, and other similar email addresses. Curiously, my email address is firstname.lastname@example.org, how come email to those addresses ended up in my account? I know Gmail support extension addresses, but none of those addresses are extension of my email address. Priyadiemail@example.com is a correct extension address of my Gmail account, but I think firstname.lastname@example.org (without ‘i’ and without dash) shouldn’t be. Does Gmail treats only first 6 characters as significant? Or do they try to guess email addresses?