Normalize email addresses for deduplication
Why this signal matters
Duplicate signups from the same person using jane@gmail.com and jane.doe+1@gmail.com inflate user counts and skew analytics. Normalization at ingest gives you one row per real mailbox and makes merge logic in your CRM predictable.
FAQ
- Why normalize emails?
- Users create duplicate accounts with dot variants, plus tags, and case differences. Normalization collapses them to one canonical mailbox.
- What is subaddressing?
- Plus-address tags like user+promo@gmail.com deliver to user@gmail.com but allow filtering. EmailGuard flags when a tag is present.
- Which providers are normalized?
- Gmail and Google Workspace dot/plus rules are applied where applicable. Other providers return a lowercased canonical form.
Related tools
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