I'm in the firstname.lastname@gmail.com club too (common first name and very common surname) and I receive so many mistaken emails that I like to collate them t

I'm in the firstname.lastname@gmail.com club too (common first name and very common surname) and I receive so many mistaken emails that I like to collate them to guess which homonyms are the same person. I often see repeated attempts to create accounts without reconsidering the email address, and sometimes they succeed (I received repeated invoices for Sky and for an insurance, not to mention occasional ones).