Email Marketing Term
What is List Hygiene?
The practice of regularly cleaning your email list by removing invalid, inactive, or unengaged subscribers.
List hygiene maintains deliverability and improves campaign performance. A smaller, engaged list outperforms a large, unengaged one.
Regular cleaning should remove: - Hard bounces (immediately) - Soft bounces (after 3+ failures) - Spam complainers (immediately) - Long-term unengaged (90-180 days) - Obvious fake emails
Before removing unengaged subscribers, run a re-engagement campaign. Some will re-activate; the rest should go.
Clean lists have higher open rates, better deliverability, lower costs (most ESPs charge by list size), and more accurate metrics.
Examples
- Remove subscribers who haven't opened in 6 months
- Clean hard bounces after every send
- Verify email syntax on signup forms
Tips for List Hygiene
- ✓Set up automatic hard bounce removal
- ✓Run re-engagement campaigns before deletion
- ✓Use email verification on signup forms
- ✓Clean list every 3-6 months minimum
Related Terms
Bounce Rate
The percentage of emails that could not be delivered to recipients' inboxes.
Email Deliverability
The ability to successfully deliver emails to recipients' inboxes rather than spam folders.
Engagement Rate
A composite metric measuring how actively subscribers interact with your emails through opens, clicks, and other actions.
Test Your Subject Lines
Put your email marketing knowledge into practice. Analyze your subject lines for free.
Try the Subject Line Tester