How to clean your email list (and why it protects your domain)
Cleaning means verifying addresses, removing hard bounces and complainers, pruning long-term non-openers, and de-duplicating. A dirty list bounces, gets complaints, and burns your sender reputation.
Short answer: clean an email list by verifying every address (syntax, DNS, SMTP), removing hard bounces and complainers, pruning contacts who haven't engaged in months, and de-duplicating. A dirty list bounces and draws spam complaints — both of which torch your sender reputation and push even your good mail to spam.
The cleaning checklist
- Verify — drop invalid + risky (catch-all, role-based) addresses.
- Suppress — remove prior hard bounces and complainers permanently.
- Prune — cut contacts with no opens/clicks/replies in 3–6 months.
- De-dupe — one record per person; merge duplicates.
- Re-verify before big sends — lists decay ~2% per month.
Why it's worth it
A smaller, clean list outperforms a bigger dirty one — better placement, higher reply rate, no reputation damage.
Autocloz verifies on import, auto-suppresses bounces/complaints, and surfaces stale segments to prune.
> Start free — verify and clean your list before the first send.