Glossary
Email one-time passcode
A short code sent by email to prove a person controls an address or to log them in.
ValidReach Team · Updated 2026-10-26
In practice
Codes expire quickly and are used once. Limit how many can be requested, so the feature cannot be used to flood someone’s inbox.
Verification and sending
The code can only arrive at a working mailbox. Verify the address at signup, and use disposable-address detection if you do not want throwaway accounts.