On the forums of darknet representatives (like old dot, exploit) there are always databases of emails of dietary supplement lovers, inhabitants of dating sites, casino players, Forex users, visitors of discount services, buyers of individual online stores for sale.
Usually such email addresses are obtained by hacking the site and parsing. The list of emails can be suitable for earning money on gambling, forex or binary options.
Do I need to buy a base?
If the email list has fallen into the hands of more than just you, but is used by many Internet spammers, then there is practically no point in such a purchase. It is better (although more expensive) to find a facebook data hacker who gets the necessary addresses by hacking thematic sites. You can find specialists on forums of hacking or spam professionals. But such resources and services are actively fought on the Internet.
Is it possible to download email addresses for free?
While email lists are periodically checked by sellers for relevance, no one cares about free database archives that you find on the Internet. You can download such databases, but their effectiveness will be zero.
What is a "leaked base"?
This is a list of real email addresses with passwords. It is obtained by hackers or supplied by unscrupulous employees of institutions (for example, commercial banks). The email database is leaked to the Internet for one purpose - to "harm". If you download such a database and use it for mailing - your domain with 100% probability will very quickly end up on the blacklist of mail services, and you will no longer be able to send mailings from it.