Several key aspects should be evaluated when checking your email list:
1. Invalid Addresses: Remove any invalid email addresses that are bouncing back your emails. 2. Duplicate Entries: Ensure there are no duplicate addresses that could skew your analytics. 3. Inactive Subscribers: Identify and either re-engage or remove subscribers who haven't interacted with your emails in a long time. 4. Spam Traps: Clean out any spam traps that could harm your sender reputation. 5. Compliance: Make sure your list complies with GDPR and CAN-SPAM Act regulations.