diff --git a/frontend/src/views/webmail/EmailView.vue b/frontend/src/views/webmail/EmailView.vue
index 9261b70c3..b4fb7b146 100644
--- a/frontend/src/views/webmail/EmailView.vue
+++ b/frontend/src/views/webmail/EmailView.vue
@@ -105,7 +105,7 @@
         <v-spacer />
         <span class="text-grey">{{ email.date }}</span>
       </div>
-      <div class="mt-2 text-grey">
+      <div v-if="email.to.length" class="mt-2 text-grey">
         {{ $gettext('To') }}
         <v-menu v-for="(rcpt, index) in email.to" :key="`to-${index}`">
           <template #activator="{ props }">
diff --git a/modoboa/webmail/lib/imapemail.py b/modoboa/webmail/lib/imapemail.py
index 04af9817a..b33ed7298 100644
--- a/modoboa/webmail/lib/imapemail.py
+++ b/modoboa/webmail/lib/imapemail.py
@@ -45,6 +45,7 @@ class ImapEmail(Email):
         self.imapc = self.imapc.__enter__()
         self.mbox, self.mailid = self.mailid.split(":")
         self.attachments: dict[str, str] = {}
+        self.To: list = []
 
     def __del__(self):
         self.imapc.__exit__()