I wish my gmail account only got the emails for 5 strangers. It's more like 50. It is indeed incredibly hard to get these errors fixed, even when they're fairly serious. Like the guy working at a US army base who managed to sign up for their internal newsletter using my address, or the married couple who gave various financial institutions my email address when buying their first home a few years ago. I'm still getting their financial information occasionally, despite trying to tell the senders that they have the wrong address.