Earlier quoted context omitted.
My name’s Corlin and I own corl.in I sign up for accounts with emails like apple@corl.in and that lets me easily filter and organize my inbox. But when I have to tell some customer service rep my email they get very confused.
I do that as well, my domain is my last name .fr When changing ISP, I gave ispname@myname.fr and the dude got confused and couldn't understand. He wanted to call his supervisor to ask if I was allowed to do that.
As someone who does a similar thing, I get this a lot. One of the most concerning (and common ones) is "oh, do you work here?".