When my Developer's License was ready for renewal, I noticed that you were sending a notification every time my customer's contact form was used. In other words, my customer was receiving this renewal notification with every email.
From my perspective, this is very annoying and sends the wrong message to my customers.
PLEASE consider revising this so that the renewal is sent to ME using the email address that you already have on file. Do not send it via the emails generated when the Contact Form is used by one of my customers.