Following on from vs Following up on

Question

I just want to understand the difference between "Following up on & Following on from". Is it exactly the same meaning?

Here you have an example:

• Following on from your email below
• Following up on your email below

Is there any difference between them?

Thanks in advance.

Answer 1

"To follow on from something" means to happen after something, and often as the next part or stage of it (Macmillan):

• Following on from last year’s success, we’ll be offering other similar courses.
• What I’m going to say follows on from what Elizabeth was saying.

"To follow up on something" means (Merriam Webster) to do something in response to (something) : to take appropriate action about (something)

He says that the police failed to follow up on his complaints.

So, Following on from your email below would mean that you are continuing a chain of meaning or information, whereas Following up on your email below would mean that you are simply responding to that email.