list-cleaning

Check if an email address really exists before you send. Live MX lookup + SMTP RCPT-TO handshake over residential IPs, with catch-all detection and risk scoring.

Bulk verify email addresses in Python — syntax, MX, mailbox, disposable, risk score. Cleans your list before sending.

Bulk email verifier & list cleaner — syntax, MX/DNS, disposable, role & typo checks with a 0-100 score. Cut bounce rate. No SMTP, no API key.

bulk email validation scoring

NeverBounce is an email verification and list cleaning service (now part of ZeroBounce) that validates individual email addresses in real time and cleans bulk lists by checking syntax, mailbox existence, role addresses, disposable addresses, catch-all domains, and deliverability to reduce bounce rates for marketing, sales, and transactional…