diff --git a/frontend/src/components/webmail/MailboxList.vue b/frontend/src/components/webmail/MailboxList.vue
index 55f90e846..1e65dc104 100644
--- a/frontend/src/components/webmail/MailboxList.vue
+++ b/frontend/src/components/webmail/MailboxList.vue
@@ -14,27 +14,23 @@
         @mouseleave="setHover(mailbox, false)"
       >
         <v-icon :icon="iconByMailboxType[mailbox.type]" class="mr-4" />
-        <template
-          v-if="
-            props.unseenCounters &&
-            mailbox.unseen > 0 &&
-            currentMailboxUnseen > 0
-          "
-        >
-          <span
-            v-if="mailbox.name === route.query.mailbox"
-            class="font-weight-bold"
-          >
+        <template v-if="mailbox.name === route.query.mailbox">
+          <span v-if="currentMailboxUnseen > 0" class="font-weight-bold">
             {{ getMailboxLabel(mailbox) }} ({{
               getCurrentMailboxUnseen(mailbox)
             }})
           </span>
-          <span v-else class="font-weight-bold">
-            {{ getMailboxLabel(mailbox) }} ({{ mailbox.unseen }})
+          <span v-else>
+            {{ getMailboxLabel(mailbox) }}
           </span>
         </template>
         <template v-else>
-          {{ getMailboxLabel(mailbox) }}
+          <span v-if="mailbox.unseen > 0" class="font-weight-bold">
+            {{ getMailboxLabel(mailbox) }} ({{ mailbox.unseen }})
+          </span>
+          <span v-else>
+            {{ getMailboxLabel(mailbox) }}
+          </span>
         </template>
         <v-spacer />
         <v-btn
diff --git a/modoboa/admin/api/v2/serializers.py b/modoboa/admin/api/v2/serializers.py
index 39b060a23..50fb3f38a 100644
--- a/modoboa/admin/api/v2/serializers.py
+++ b/modoboa/admin/api/v2/serializers.py
@@ -467,7 +467,7 @@ class WritableAccountSerializer(v1_serializers.WritableAccountSerializer):
     """Add support for aliases and sender addresses."""
 
     aliases = serializers.ListField(
-        child=lib_fields.DRFEmailFieldUTF8(), required=False
+        child=lib_fields.DRFEmailFieldUTF8AndEmptyUser(), required=False
     )
     mailbox = MailboxSerializer(required=False)