diff --git a/app/courrier/[id]/route.ts b/app/courrier/[id]/route.ts
index 5895b24c..871dd83c 100644
--- a/app/courrier/[id]/route.ts
+++ b/app/courrier/[id]/route.ts
@@ -75,7 +75,7 @@ export async function GET(request: Request, props: { params: Promise<{ id: strin
         secure: true,
         auth: {
           user: credentials.email,
-          pass: credentials.password,
+          pass: credentials.password || undefined,
         },
         logger: false,
       });
@@ -219,7 +219,7 @@ export async function POST(request: Request, props: { params: Promise<{ id: stri
         secure: true,
         auth: {
           user: credentials.email,
-          pass: credentials.password,
+          pass: credentials.password || undefined,
         },
         logger: false,
       });