Why hasn’t the message I’m expecting arrived?
A message can take a few minutes to arrive, or it may have been put in the junk folder.
Step by step
In Mail, click Actualiser (Refresh) (the circular arrow above the list).
Look in the Indésirables (Junk) folder: if it’s there, put it back in your inbox.
Check that you are looking at the right mailbox, if you have several.
Ask the sender to check your address, letter by letter.