Filter Spam or Detect Spammers with Alias in Gmail

Had to share this as I´m getting tired of companies selling out my email to advertisers, leaked to spammers or them starting to spam my inbox just because I once registered on their service. So by adding a company-specific string to your email-address you can filter all spam and identify the origin of who sold out your address. E.g., I tested this when buying a travel ticket. Upon registration I did not provide them with my original email-address (, but rather an address specifically crafted for this travel service agency ( I will still receive the emails from the company, but also filter out its origin, even if they shared it with cooperating companies or advertisers.

Check out Filter using Gmail aliases at the bottom here.