The Everest Seed List is a collection of email addresses owned by Validity where you send your email campaigns for testing in order to collect important deliverability data. Each email address is called a seed. Seeds track how your email is being placed by mailbox providers, whether it is blocked at the gateway, sent to the spam folder, or passed through to the inbox.
The Everest Seed List is composed of seed addresses at mailbox providers and business-to-business (B2B) filter and hosting providers throughout Africa, Asia, Europe, Oceania, North America, and South America, including AOL, Gmail, Yahoo!, Microsoft, and others.
However, it's important to note that Validity does not have any partnerships or agreements with mailbox providers that influence seed inbox placement data. Deliverability results are reflective of a sender's reputation and overall email campaign performance.