Third party mailing list form
You can use a contact form from a third party mailing list provider such as MailChimp.com. This way, added contacts go directly into their system.
To do this you can try the following:
- Within the third party site (such as MailChimp.com) look for instructions on how to create an embeddable mailing list form.
- After creating the form, you should be presented with some embed code. Copy this.
Add it to your contact page
Paste the embed code into the Contact page > Facebook badge section. (This can be added before or after any existing Facebook badge embed code)
or, add it to a separate page
Create a new text page, with an embed section, and paste it there.