I once got an email about the funeral arrangements for somebody's mother. I know this person very well, because he uses my email address for everything. I know

I once got an email about the funeral arrangements for somebody's mother. I know this person very well, because he uses my email address for everything. I know what internet subscription he has. I know where he bought his e-bike. Where he goes on holiday. Etc. I was expecting this person to be you.