dns-validation topic

Validate email address with Mailgun's validation service (Syntax checks, DNS validation, MX validation)

overint

🚀 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.

truemail-rb

Certbot external DNS, HTTP, TLSSNI domain validation plugin with JSON output and scriptable hooks, with Dehydrated compatibility

EnigmaBridge

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

truemail-rb