diff --git a/modoboa/core/drf_authentication.py b/modoboa/core/drf_authentication.py
deleted file mode 100644
index 561c88fee..000000000
--- a/modoboa/core/drf_authentication.py
+++ /dev/null
@@ -1,50 +0,0 @@
-"""Custom authentication for DRF."""
-
-from django.urls import reverse
-from django.utils.translation import gettext_lazy as _
-
-from django_otp.models import Device
-from drf_spectacular.contrib.rest_framework_simplejwt import SimpleJWTScheme
-from rest_framework import status
-from rest_framework.exceptions import APIException
-from rest_framework_simplejwt.authentication import JWTAuthentication
-
-from . import constants
-
-
-class NotVerified(APIException):
-    status_code = status.HTTP_418_IM_A_TEAPOT
-    default_detail = _("Missing 2FA verification.")
-    default_code = "not_verified"
-
-
-class JWTAuthenticationWith2FA(JWTAuthentication):
-    """Add 2FA support."""
-
-    def verify_user(self, request, user):
-        header = self.get_header(request)
-        raw_token = self.get_raw_token(header)
-        validated_token = self.get_validated_token(raw_token)
-        url_exceptions = (reverse("v2:account-tfa-verify-code"),)
-        if request.path in url_exceptions:
-            return
-        if constants.TFA_DEVICE_TOKEN_KEY in validated_token:
-            device_id = validated_token[constants.TFA_DEVICE_TOKEN_KEY]
-            device = Device.from_persistent_id(device_id)
-            if device is not None and device.user_id == user.pk:
-                return
-        raise NotVerified
-
-    def authenticate(self, request):
-        result = super().authenticate(request)
-        if result is None:
-            return None
-        user, token = result
-        if user.tfa_enabled:
-            self.verify_user(request, user)
-        return user, token
-
-
-class SimpleJWTWith2FAScheme(SimpleJWTScheme):
-    target_class = "modoboa.core.drf_authentication.JWTAuthenticationWith2FA"
-    name = "jwt2FAAuth"