Ride on the email
I think you meant "ride on the email" as a phrase, not literally!
"Ride on the email" is a common idiomatic expression that means to follow up or respond to an email. It's often used to acknowledge receipt of an email or to indicate that you're working on a task or issue related to the email.
For example:
Person A: "I sent you an email about the project deadline." Person B: "Ride on the email, I'll get back to you soon."
In this context, "ride on the email" is a casual way of saying "I've got it, I'll take care of it" or "I'll get back to you soon."