French phrase
La lettre doit être envoyée via ~.
Meaning
The letter must be sent via ___.
When to use it
Indicates the required route for sending a letter. The wording is formal and somewhat official.
Example dialogue
La lettre doit être envoyée via le service des admissions.
The letter must be sent via the admissions office.
D'accord, je la déposerai au service demain.
All right, I'll take it to the admissions office tomorrow.