If you're building an email with custom HTML, you will need to add your physical address and unsubscribe options manually.
To do so, add the following into your code:
Unsubscribe Link: <a href="*|UNSUB|*">Unsubscribe</a>
Physical Address: *|HTML:LIST_ADDRESS_HTML|*
Company Name: *|LIST:COMPANY|*
And will look like this in the email.
Basic HTML Email
Include the same code at the bottom of your HTML email
Other merging tags
As yet, the only other merging tag available in Custom HTML is your subscribers' name.
Subscribers' name: *|NAME|*
Open in browser tag: *|ARCHIVE|*