One of the quirks of gmail is all subsequent email accounts similar to yours belong to you. Eg, your acct is juandelacruz. That means if someone has an acct later called juan.delacruz that acct belongs to you too and you get to see e-mail sent to them.
I keep getting email to this account. It seems he borrowed ~1000 pesos from Money Cat but is now overdue. He note owes +4k with penalties. Probably just a kid because he can't pay and his credit rating is now shot.
I get other email too with similar accounts to mine. I tried contacting them. They don't seem to get it because the email keeps getting sent to the original acct (mine).
I think periods in Gmail accounts don't make a difference. juandelacruz is treated the same as juan.delacruz
Ah, I found the Google support page
Dots don't matter in Gmail addresses - Gmail Help
Dots don't matter in Gmail addresses - Gmail Help