Email Address Collectors/ Newsletter Sign Ups/ Customer Contact Forms, Need To Understand Existing (CMS(?) Code Options

[jerkinslow]

Greetings: I've recently taken over responsibility for managing the following website:

Home Page

Note the "site visitor email address collector" found under the header "Free Tips, Discounts & Promos". Presumably, site visitors can enter their email address in order to receive the site newsletter. Additionally on the same page, see the submission form under the header: "No Job Too Small... Get Your Free Estimate Today!". Again, the site visitor is encouraged to submit first name, last name, email address & phone number, and a brief description of needed work vis a vis the form.

Can someone identify the specific code (in its entirety) which governs this site visitor interaction? Essentially, my goal is to "update" or otherwise "swap out" the email address currently associated with these 2 site visitor interaction opportunities (submission forms) so that contact details provided by site visitors (specifically those who choose to provide contact details) are routed properly to an email address of my choosing.

There are a few more submission forms found on other related site pages. One can be found here: 7 Things You Must Know Before Hiring a Painter

And another here: 5 Suggestions To Choose Paint Colors

My goal with posting this thread is to:

1) better understand what specific script(s), even if those scripts are remotely-hosted), is being invoked when a site visitor chooses to submit contact details through one or all of the above site interactions &
2) understand exactly (step by step) what process or code edits/modifications are needed to ensure site visitor-provided contact details are routed to an email address of my choosing.

Thanks in advance --