diff --git a/client/UserCreation.vue b/client/UserCreation.vue
index bc44a4e83886c9d0fa13f0bc64b084ab6ae88df0..69fe54101f0619c98c79ab4a17e7f3fa55661703 100644
--- a/client/UserCreation.vue
+++ b/client/UserCreation.vue
@@ -106,6 +106,10 @@ export default {
       if (!this.user.email || !this.user.email.includes('@') || !this.user.email.includes('.')) {
         this.errors.email = "Specify a valid email address";
       }
+      else if (this.user.email.endsWith('@liu.se'))
+      {
+        this.errors.email = "LiU users should use their LiU-ID to sign in";
+      }
 
       var username = this.user.username || (this.user.name && this.username_placeholder);