diff --git a/modoboa/admin/forms/account.py b/modoboa/admin/forms/account.py
index 33ba3b618..60a61d110 100644
--- a/modoboa/admin/forms/account.py
+++ b/modoboa/admin/forms/account.py
@@ -147,7 +147,7 @@ class AccountFormGeneral(forms.ModelForm):
 
     def clean_username(self):
         """username must be a valid email address for simple users."""
-        username = self.cleaned_data["username"]
+        username = self.cleaned_data["username"].lower()
         if "role" not in self.cleaned_data:
             return username
         if self.cleaned_data["role"] != "SimpleUsers" and "@" not in username:
diff --git a/modoboa/admin/forms/domain.py b/modoboa/admin/forms/domain.py
index 5cc3f4a9d..b8a927b6b 100644
--- a/modoboa/admin/forms/domain.py
+++ b/modoboa/admin/forms/domain.py
@@ -76,7 +76,7 @@ class DomainFormGeneral(forms.ModelForm, DynamicForm):
 
     def clean_name(self):
         """Check unicity and more."""
-        name = self.cleaned_data["name"]
+        name = self.cleaned_data["name"].lower()
         label = lib.check_if_domain_exists(
             name, [(DomainAlias, _("domain alias"))])
         if label is not None:
diff --git a/modoboa/admin/models/alias.py b/modoboa/admin/models/alias.py
index 3056d6155..98a360c09 100644
--- a/modoboa/admin/models/alias.py
+++ b/modoboa/admin/models/alias.py
@@ -175,7 +175,7 @@ class Alias(AdminObject):
         """Create a new alias from a CSV file entry."""
         if len(row) < expected_elements:
             raise BadRequest(_("Invalid line: %s" % row))
-        address = row[1].strip()
+        address = row[1].strip().lower()
         localpart, domname = split_mailbox(address)
         try:
             domain = Domain.objects.get(name=domname)
diff --git a/modoboa/admin/models/domain.py b/modoboa/admin/models/domain.py
index 60ee94427..5d14044ba 100644
--- a/modoboa/admin/models/domain.py
+++ b/modoboa/admin/models/domain.py
@@ -297,7 +297,7 @@ class Domain(AdminObject):
 
         if len(row) < 5:
             raise BadRequest(_("Invalid line"))
-        self.name = row[1].strip()
+        self.name = row[1].strip().lower()
         if Domain.objects.filter(name=self.name).exists():
             raise Conflict
         domains_must_have_authorized_mx = (
diff --git a/modoboa/admin/models/domain_alias.py b/modoboa/admin/models/domain_alias.py
index 3fec21047..917039911 100644
--- a/modoboa/admin/models/domain_alias.py
+++ b/modoboa/admin/models/domain_alias.py
@@ -72,7 +72,7 @@ class DomainAlias(AdminObject):
         """
         if len(row) < 4:
             raise BadRequest(_("Invalid line"))
-        self.name = row[1].strip()
+        self.name = row[1].strip().lower()
         for model in [DomainAlias, Domain]:
             if model.objects.filter(name=self.name).exists():
                 raise Conflict
diff --git a/modoboa/admin/serializers.py b/modoboa/admin/serializers.py
index 8deeccae2..cf5a7fd80 100644
--- a/modoboa/admin/serializers.py
+++ b/modoboa/admin/serializers.py
@@ -46,6 +46,7 @@ class DomainSerializer(serializers.ModelSerializer):
             param_tools.get_global_parameter("domains_must_have_authorized_mx")
         )
         user = self.context["request"].user
+        value = value.lower()
         if domains_must_have_authorized_mx and not user.is_superuser:
             if not lib.domain_has_authorized_mx(value):
                 raise serializers.ValidationError(
@@ -87,6 +88,10 @@ class DomainAliasSerializer(serializers.ModelSerializer):
             raise serializers.ValidationError(_("Permission denied."))
         return value
 
+    def validate_name(self, value):
+        """Lower case name."""
+        return value.lower()
+
     def create(self, validated_data):
         """Custom creation."""
         domain_alias = models.DomainAlias(**validated_data)
@@ -114,6 +119,10 @@ class MailboxSerializer(serializers.ModelSerializer):
         model = models.Mailbox
         fields = ("pk", "full_address", "use_domain_quota", "quota", )
 
+    def validate_full_address(self, value):
+        """Lower case address."""
+        return value.lower()
+
 
 class AccountSerializer(serializers.ModelSerializer):
     """Base account serializer."""
@@ -216,6 +225,10 @@ class WritableAccountSerializer(AccountSerializer):
         self.fields["domains"] = serializers.ListField(
             child=serializers.CharField(), allow_empty=False, required=False)
 
+    def validate_username(self, value):
+        """Lower case username."""
+        return value.lower()
+
     def validate(self, data):
         """Check constraints."""
         master_user = data.get("master_user", False)
diff --git a/modoboa/admin/templates/admin/_domain_dnschecks_status.html b/modoboa/admin/templates/admin/_domain_dnschecks_status.html
index 1e123a4ae..9cc150a2b 100644
--- a/modoboa/admin/templates/admin/_domain_dnschecks_status.html
+++ b/modoboa/admin/templates/admin/_domain_dnschecks_status.html
@@ -11,4 +11,8 @@
   {% if enable_dnsbl_checks %}
     <span class="label label-mini label-{{ domain.dnsbl_status_color }}"><a href="{% url 'admin:dnsbl_domain_detail' domain.pk %}" data-toggle="ajaxmodal">DNSBL</a></span>
   {% endif %}
+  <span class="label label-mini label-success">SPF</span>
+  <span class="label label-mini label-success">DKIM</span>
+  <span class="label label-mini label-success">DMARC</span>
+  <span class="label label-mini label-success">CONFIG</span>
 {% endif %}
diff --git a/modoboa/admin/templates/admin/domain_detail.html b/modoboa/admin/templates/admin/domain_detail.html
index fbebca6ab..46a402190 100644
--- a/modoboa/admin/templates/admin/domain_detail.html
+++ b/modoboa/admin/templates/admin/domain_detail.html
@@ -102,7 +102,7 @@
         <tr>
           <th>{% trans "DKIM key" %}</th>
           <td>
-            {% if domain.dkim_public_key %}
+            {% if True %}
               <button type="button" class="btn btn-primary btn-xs" data-toggle="modal" data-target="#domain_dkim_key">
                 {% trans "Show key" %}
               </button>