Determine Content Lifespan: Decide how long the content will remain relevant. For example, a holiday promotion might only be valid for a few weeks. Use Automation: Utilize email marketing tools to automate the removal or updating of expired content. Testing: A/B test different expiration periods to find the most effective lifespan for your content. Set Clear Expectations: Inform your subscribers about the expiration date of offers or promotions within the email content.