reacherhq / check-if-email-exists

Check if an email address exists without sending any email, written in Rust. Comes with a ⚙️ HTTP backend.

FGRibreau / mailchecker

:mailbox: Cross-language temporary (disposable/throwaway) email detection library. Covers 55 734+ fake email providers.

truemail-rb / truemail

🚀 Configurable framework agnostic plain Ruby 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.