Identifying Invalid Emails: Use email verification tools to find and remove invalid email addresses. Removing Inactive Subscribers: Identify inactive subscribers who haven't engaged with your emails for a specified period and remove or re-engage them. Eliminating Duplicates: Remove duplicate email addresses to ensure that each contact receives only one email. Updating Contact Information: Regularly update contact information to ensure accuracy. Segmenting Your List: Segment your email list based on subscriber engagement levels to tailor your campaigns more effectively.