diff --git a/app/api/views/alias.py b/app/api/views/alias.py
index 631a4fee..3b485f5c 100644
--- a/app/api/views/alias.py
+++ b/app/api/views/alias.py
@@ -326,7 +326,7 @@ def create_contact_route(alias_id):
     if alias.user_id != user.id:
         return jsonify(error="Forbidden"), 403
 
-    contact_addr = data.get("contact").lower()
+    contact_addr = data.get("contact")
 
     # generate a reply_email, make sure it is unique
     # not use while to avoid infinite loop
@@ -337,6 +337,7 @@ def create_contact_route(alias_id):
             break
 
     _, contact_email = parseaddr(contact_addr)
+    contact_email = contact_email.lower()
 
     # already been added
     if Contact.get_by(alias_id=alias.id, website_email=contact_email):
diff --git a/app/dashboard/views/alias_contact_manager.py b/app/dashboard/views/alias_contact_manager.py
index ace54277..63d548b3 100644
--- a/app/dashboard/views/alias_contact_manager.py
+++ b/app/dashboard/views/alias_contact_manager.py
@@ -68,7 +68,7 @@ def alias_contact_manager(alias_id):
     if request.method == "POST":
         if request.form.get("form-name") == "create":
             if new_contact_form.validate():
-                contact_email = new_contact_form.email.data.strip().lower()
+                contact_email = new_contact_form.email.data.strip()
 
                 # generate a reply_email, make sure it is unique
                 # not use while to avoid infinite loop
@@ -79,6 +79,7 @@ def alias_contact_manager(alias_id):
                         break
 
                 _, website_email = parseaddr(contact_email)
+                website_email = website_email.lower()
 
                 contact = Contact.get_by(alias_id=alias.id, website_email=website_email)
                 # already been added