We refuse 121,969 email domains at sign-up, and 2.4 MB of them never reach the browser

Making an account on Nakodo with a 10 minute mailbox gets you this: That's a temporary email address. Use a permanent one, so you don't lose the account or miss a reply. The second half of that sentence is the whole reason the check exists. Nakodo writes to creators on a brand's behalf and relays what comes back, so the account's email address is where the answers land. An account whose inbox expires in ten minutes is an account that cannot be told anything, including that somebody said yes.