An email is received for processing at a specified email address.
In the body is a link to a (non-secure) page containing a form - probably a wordpress page (with field labels)
then, there are text items preceded by a delimiter ( ":" - colon). An example email looks like this:
Subject: Form Entry F01M
[web link here]
Address 1:4916 Crockett Blvd
(only the : separates the descriptor from the values)
The script posts the values to the form fields whose names match the descriptor before the :
Any field that does not match or have a value is ignored. Form is submitted.