diff --git a/server/src/services/appointment.service.ts b/server/src/services/appointment.service.ts
index 13ea21ec46..4796ea92e8 100644
--- a/server/src/services/appointment.service.ts
+++ b/server/src/services/appointment.service.ts
@@ -189,10 +189,19 @@ export const processAppointmentToCfaWebhookEvent = async (payload) => {
   return true
 }
 
-export const isHardbounceEventFromAppointment = async (payload) => {
+export const isHardbounceEventFromAppointmentApplicant = async (payload) => {
   const messageId = payload["message-id"]
 
-  const appointment = await findOne({ $or: [{ "to_cfa_mails.message_id": messageId }, { "to_applicant_mails.message_id": messageId }] })
+  const appointment = await findOne({ "to_applicant_mails.message_id": messageId })
+  if (appointment) {
+    return true
+  }
+  return false
+}
+export const isHardbounceEventFromAppointmentCfa = async (payload) => {
+  const messageId = payload["message-id"]
+
+  const appointment = await findOne({ "to_cfa_mails.message_id": messageId })
   if (appointment) {
     return true
   }
diff --git a/server/src/services/emails.service.ts b/server/src/services/emails.service.ts
index ea8a7cd51b..a76d7b5d87 100644
--- a/server/src/services/emails.service.ts
+++ b/server/src/services/emails.service.ts
@@ -1,5 +1,10 @@
 import { addEmailToBlacklist, processApplicationHardbounceEvent, removeEmailFromLbaCompanies } from "@/services/application.service"
-import { isHardbounceEventFromAppointment, processAppointmentToApplicantWebhookEvent, processAppointmentToCfaWebhookEvent } from "@/services/appointment.service"
+import {
+  isHardbounceEventFromAppointmentApplicant,
+  isHardbounceEventFromAppointmentCfa,
+  processAppointmentToApplicantWebhookEvent,
+  processAppointmentToCfaWebhookEvent,
+} from "@/services/appointment.service"
 
 import { BrevoEventStatus } from "./brevo.service"
 import { disableEligibleTraininForAppointmentWithEmail } from "./eligibleTrainingsForAppointment.service"
@@ -27,10 +32,14 @@ export const processHardBounceWebhookEvent = async (payload) => {
       origin = "candidature_spontanee"
     }
 
-    if (await isHardbounceEventFromAppointment(payload)) {
+    if (await isHardbounceEventFromAppointmentCfa(payload)) {
       origin = "prise_de_rdv"
     }
 
+    if (await isHardbounceEventFromAppointmentApplicant(payload)) {
+      origin = "candidat_prise_de_rdv"
+    }
+
     if (await isHardbounceEventFromEtablissement(payload)) {
       origin = "invitation_prise_de_rdv"
     }
diff --git a/server/src/services/user.service.ts b/server/src/services/user.service.ts
index 7c1892f35f..301ee162d1 100644
--- a/server/src/services/user.service.ts
+++ b/server/src/services/user.service.ts
@@ -36,7 +36,7 @@ export const createOrUpdateUserByEmail = async (email: string, update: Partial<I
 }
 
 export const cleanHardbouncedAppointmentUser = async (email: string) => {
-  const fakeEmail = `hardbounced-${randomUUID()}@faux-domaine.fr`
+  const fakeEmail = `email-blacklist-par-lba-${randomUUID()}@faux-domaine.fr`
   await getDbCollection("users").findOneAndUpdate(
     { email },
     {