To help you build your mailing list, Reach comes with a dynamic Newsletter section.
Add a newsletter signup section to your home page
Navigate to the Sections tab in the theme editor and select Add section > Newsletter.
Customize the copy and content
You can give the section an optional Heading and Text. This text content can provide more context for what your newsletter offers—exclusive deals, perks, events, etc.
Use the Background dropdown to select a background color option.
Activate Enable background image to include an icon of a letter (as in a piece of mail) as a background motif.