Email Normalize API
Canonicalize email addresses so you can deduplicate accounts and catch different aliases of the same inbox. The normalize endpoint lower-cases the address and applies provider-aware rules: it strips the dots from Gmail and Googlemail local parts (because Gmail ignores them) and maps googlemail.com to gmail.com, removes +tag sub-addressing for Gmail and the many providers that support it — Outlook, Hotmail, Live, iCloud, Fastmail, Proton, Yandex, Zoho, GMX and more — and, by default, for every domain so duplicates never slip through, while reporting exactly which changes it made and which provider it detected. The compare endpoint normalizes two addresses and tells you whether they resolve to the same mailbox. Everything is computed locally and deterministically, with no DNS or network calls, so it is instant and private. Ideal for sign-up and registration dedup, fraud and abuse prevention (one person, many aliases), CRM and mailing-list hygiene, and merging customer records. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This normalizes addresses for comparison; to verify that an address actually exists and can receive mail (MX, disposable, role accounts) use an email-verification API.
api.oanor.com/emailnormalize-api
