Initial form sending is handled via formspree.io with a Gold account. As form submissions arrive there, Formspree sends out the received data to the email addresses setup as CC in [our site config](../_config.yml).
The Zapier email parser is a special mailbox provided by Zapier which receives form submissions from Formspree, parses the content of those emails and extracts data fields out of it. The parser as a source then provides the structured data to our Zapier tasks.