French phrase
Je fais suite à ~.
Meaning
I am following up on ___.
When to use it
Used to follow up on an earlier message or matter. Common in polite, somewhat formal business emails.
Example dialogue
Je fais suite à votre e-mail d'hier.
I am following up on your email from yesterday.
Merci, j'ai bien reçu, je réponds demain.
Thank you, I received it. I will reply tomorrow.