It's interesting to see who sold your email address by looking at the left side of the address. The most annoying one for me is that the email address I created

It's interesting to see who sold your email address by looking at the left side of the address. The most annoying one for me is that the email address I created for registering my transit pass was somehow passed along to a state political party, at which point it ended up on lots of political fundraising lists. Doubt the transit agency sold it to the political party, it was probably someone who worked for them who thought it would be good leads for their particular preferred party. At the other end of the spectrum was the place I used to get my hair cut selling (or losing through poor security) their email addresses to low quality spammer selling "Male performance enhancement" pills. Most of the time, the email addresses only end up coming from the company they were given to, but a few hacks like LinkedIn continue to produce scams and spam emails.