Mail d'au revoir
A lovely phrase!
"Mail d'au revoir" is French for "Farewell letter" or "Letter of goodbye". It's a beautiful way to express a sense of closure and finality in a written correspondence.
In French, "mail" can also mean "letter" or "missive", and "au revoir" is a common way to bid farewell, which literally means "until we see each other again".
So, "Mail d'au revoir" is a poignant phrase that conveys a sense of departure, but also leaves the door open for a potential reunion or future correspondence.