There are several methods to keep your email lists clean and updated:
1. Bounce Management: Regularly remove hard bounces (permanent delivery failures) and investigate soft bounces (temporary issues). 2. Engagement Metrics: Remove subscribers who have not engaged with your emails over a specified period, such as six months. 3. Opt-In Confirmation: Use double opt-in methods to ensure that subscribers genuinely want to receive your emails. 4. Data Enrichment Tools: Use third-party tools to verify and update email addresses.