Por mail

You're referring to the French phrase "par mail"!

"Par mail" is a French expression that means "by mail" or "by post". It's often used to indicate that something will be sent or received through the postal service, rather than in person or by other means.

For example:

• "Je vais envoyer le document par mail." (I'll send the document by mail.)
• "J'ai reçu le colis par mail hier." (I received the package by mail yesterday.)

In informal contexts, you might also see the phrase "par la poste" (by post) used interchangeably with "par mail".