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# How do I know who leaked or sold my email (and how you can too)
- URL: https://blog.borodutch.com/how-i-know-who-leaked-or-sold-my-email-and-how-you-can-too/
- Published: 2023-01-12T17:05:13.000Z
- Updated: 2023-01-12T17:05:13.000Z
- Description: I know precisely who leaked or sold my personal information. This article explains the method I use.
- Author: Nikita Kolmogorov
- Tags: General, #Import 2025-04-04 22:42

Hi, internet! I'm writing this short blog post because I keep reiterating the method of learning who sells or leaks my data to different people. I'm writing this once and will simply share the link to this post whenever I need to share the info.

By now, you're probably familiar with email aliases. For instance, you can have n+google@bdut.ch or n+meta@bdut.ch. However, spammers are smart enough to strip aliases from the leaked or sold data — so aliases don't work.

Instead of using aliases, I'm proposing a technique that can't be fooled by spammers. I'm not the one who came up with it. I found it on the internet, used it, and I'm sharing it with you.

Use custom domain name email addresses with catch-all. Instead of repeatedly signing up for services with the same email (e.g. n@bdut.ch), put the name of the service as part of the email before the @ symbol. So if I sign up for Grammarly, it's grammarly@bdut.ch; Facebook — meta@bdut.ch; Google — google@bdut.ch; Farcaster — farcaster@bdut.ch. It works even in the most unobvious places. For instance, I use it for my massage therapist, all loyalty programs and credit cards.

Because you use catch-all, all the emails to **any** name before the @ symbol will go to the primary email (it's n@bdut.ch for me). You will never miss a single email this way!

I'm using Google Suite because I have a corporate subscription, but I'm sure there are free alternatives (or self-hosted ones like [mailinabox.email](https://mailinabox.email/?ref=blog.borodutch.com)).

Now you are also aware of this incredible way of knowing precisely who leaks or sells your data. Go use it and publicly shame the companies that do so!