Ghost makes it possible to edit any link contained in an email newsletter, even after it has been delivered to your audience. This gives you an opportunity to correct typos or update the URL of tweets that might have been deleted post-send.
To correct or update a link you’ve sent in an email newsletter, click on the graph icon for the post, from the post list in Ghost Admin.
In the Newsletter clicks section of your post analytics, click on the link which needs to be updated and make your changes, then click Update.
Once updated, the click count will be reset to zero and Ghost will automatically ensure that anyone who clicks on the link within your newsletter will be redirected to the correct location.