Email Verifier

Verify whether email addresses are deliverable by connecting to the recipient's mail server and checking if it accepts the address — without actually sending any mail.

How It Works

1. MX Lookup — Resolves the domain's mail exchange server
2. SMTP Handshake — Connects to the MX server on port 25
3. RCPT TO Check — Asks the server if it would accept mail for the address
4. Catch-All Detection — Tests a random address to detect catch-all domains

Dependencies

pip3 install dnspython

Usage