Customers often have campaigns with limited offers. So they want to have their CTA link validity only for a certain time period or until a specified date. Therefore the link should be only valid until this time and afterwards expire and the link should redirect to a new destination URL after the orginial one has expired.

Therefore it should be possible to specify in the email:

1. Expiration Yes/No,
2. Validity Duration or End Date
3. Expiration URL or expiration message (like "Sorry, this link has expired" or "Sorry, this campaign has ended)

When the end date/duration has passed the link in the email should redirect to the expiration URL or the expiration message should be displayed.

How others implemented it:

https://www.crazyeyemarketing.com/blog/how-to-insert-expiring-links-into-your-autoresponder/

https://help.short.io/en/articles/4065848-how-to-set-up-link-expiration-temporary-url