Detect whether a signup email is an alias (user+promo@gmail.com, Gmail dot variations j.o.h.n@gmail.com, Apple Hide My Email @privaterelay.appleid.com, SimpleLogin, or corporate role aliases like sales@) and resolve its canonical root address.
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An email alias is a forwarding or virtual email address that delivers messages into a primary inbox without creating a separate mailbox. Common types include subaddressing with a plus sign (alex+news@gmail.com), Gmail dot variations (a.l.e.x@gmail.com), corporate department aliases (billing@company.com), and privacy relays (Apple Hide My Email, SimpleLogin, DuckDuckGo @duck.com).
Abusers often register dozens of free accounts using Gmail dot permutations (u.s.e.r@gmail.com) or plus tags (user+1@gmail.com, user+2@gmail.com). By normalizing the email to its canonical root address and checking for disposable/relay domains via KaijuVerifier’s API, you can enforce 1 free trial per real human inbox.
Yes, emails sent to a valid alias are forwarded to the owner’s main inbox. Our 7-Layer Smart SMTP Verifier confirms whether the alias is actively accepted by the destination mail server.