To attach links for previous messages to new contacts, use the template editor:

1. In the template editor, click on the Archive link component.
   
2. Select and drag either Ordered list or Unordered list into the editor. A popup will appear.
   
3. Remove the messages that you do not want to include and edit the message subjects if needed. Click Next.
   
4. Reorder the messages as needed. Click Okay.
   

The campaign will be sent with links to previous messages to your contacts who haven't received those messages. Existing contacts will have these links automatically removed.