List hygiene means keeping your marketing contact lists accurate, permission-based and engaged: validating new contacts, removing bounced and invalid addresses, suppressing unsubscribes and complainers, and pruning people who haven't engaged in months.
Why it matters
- Better deliverability: fewer bounces and spam-trap hits
- Truer metrics: open and click rates reflect real interest
- Lower costs: stop paying to message dead contacts
- Compliance: DPDP principles favour accurate data that's kept only as long as needed
A simple hygiene routine
| When | Action |
|---|---|
| On every import | Validate addresses or numbers; remove duplicates |
| After every campaign | Remove hard bounces; suppress opt-outs |
| Monthly | Review complaints and soft bounces |
| Quarterly | Re-engage contacts inactive for 6–12 months, then remove non-responders |
Tools
Validate email lists before big sends. For WhatsApp, remove numbers that aren't on WhatsApp and respect opt-outs immediately.
Example
A retailer validates a 30,000-contact list before its Diwali campaign, removes invalid addresses and sends only to people active in the last year. Bounces stay low and complaints are minimal.
Related terms
Email deliverability · Open rate · DPDP Act
Guide: how to clean your email list.
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