Reply lets you add an opt-out link to any place of the email body. To do this:
Open the text editor and select the place to insert an opt-out link.
2. In the text editor, click the Insert/edit link button to open the Insert link dialog window.
3. In the Url field of the Insert link dialog window, enter {opt-out}. Reply will recognize this text and convert into an opt-out link.
4. In the Text to display field of the Insert link dialog window, enter the link text (for example, here).
5. Click Ok to insert the link.
Note
If you have already enabled the Unsubscribe via opt-out link option in your email account settings, inserting an opt-out link in the email body will lead to two simultaneous opt-out links.
To avoid this:
Navigate to Settings - Email Accounts - Account settings - Opt-out text.
Remove text from the Text at the bottom of email field.
Click Save settings.