Clean an email list
Remove unengaged, role, and high-risk addresses before the next campaign.
- Difficulty:
- Intermediate
- Prerequisites:
- Engagement history, Suppression lists
- Last updated:
- 2026-07-15
- Author:
- empire
Objective
Improve list hygiene
Validate, clean, and segment lists before high-risk sends.
Starting state
List validated or recently sent; hygiene pass required
Prerequisites
- Engagement history
- Suppression lists
Estimated time
1–2 hours
Difficulty
intermediate
Required access
- CRM / ESP list tools
Inputs
- List export
- Engagement window
- Role/risk rules
Step-by-step instructions
- Apply suppressionsRemove complainers, unsubscribes, and known invalids first.
- Sunset unengagedQuarantine addresses with no positive engagement inside your policy window.
- Re-permission risky cohortsDo not blast stale purchased or scraped cohorts; require fresh consent.
Verification
- Complaint and bounce projections fall for the cleaned cohort
Common mistakes
- Cleaning only syntax while keeping trap-prone stale names
- How aggressive should the engagement sunset be for this brand?
Rollback / recovery
- Restore a backup segment only after re-validating it
Expected outcome
The sendable list is smaller, safer, and engagement-weighted.
When to escalate
- Trap or blocklist signals persist after cleaning