Remove Invalid and Inactive Emails: Regularly remove hard bounces (invalid addresses) and soft bounces (temporary issues). Also, consider removing subscribers who haven’t engaged with your emails in the past 6-12 months. Use Double Opt-In: Implementing a double opt-in process ensures that the email addresses you collect are valid and that subscribers are genuinely interested in receiving your content. Segment Your List: Segmentation helps in targeting the right audience with the right message, thereby improving engagement and reducing the likelihood of unsubscribes and spam complaints. Validate Email Addresses: Use an email validation tool to check the authenticity of email addresses at the point of collection. Monitor Engagement: Regularly monitor key metrics such as open rates, click-through rates, and conversion rates to identify and remove unengaged subscribers. Update Preferences: Allow subscribers to update their preferences and segment themselves to ensure they receive content that is relevant to them. Comply with Regulations: Ensure your data collection and email marketing practices comply with relevant regulations like GDPR and CAN-SPAM.