How Can You Identify Invalid or Outdated Email Lists?
Email Verification Services: Utilize email verification services to check the validity of email addresses. These services can identify whether an email address is active or inactive, helping you maintain a clean list.
Hard Bounces: Monitor hard bounces closely. A high number of hard bounces indicates that many of your email addresses are invalid. Remove these addresses immediately to maintain list quality.
User Engagement: Track engagement metrics such as open rates and click-through rates. Low engagement levels can be a sign that your list contains outdated or inactive email addresses.