diff --git a/Azaion.Common/Requests/RegisterUserRequest.cs b/Azaion.Common/Requests/RegisterUserRequest.cs
index 8bd9b82..e8756ad 100644
--- a/Azaion.Common/Requests/RegisterUserRequest.cs
+++ b/Azaion.Common/Requests/RegisterUserRequest.cs
@@ -15,7 +15,7 @@ public class RegisterUserValidator : AbstractValidator<RegisterUserRequest>
     public RegisterUserValidator()
     {
         RuleFor(r => r.Email)
-            .MinimumLength(8).WithErrorCode(ExceptionEnum.EmailLengthIncorrect.ToString()).WithMessage("Email address should be at least 8 characters.")
+            .NotEmpty().WithErrorCode(ExceptionEnum.EmailLengthIncorrect.ToString()).WithMessage("Email address is required.")
             .EmailAddress().WithErrorCode(ExceptionEnum.WrongEmail.ToString()).WithMessage("Email address is not valid.");
 
         RuleFor(r => r.Password)
diff --git a/e2e/Azaion.E2E/Tests/UserManagementTests.cs b/e2e/Azaion.E2E/Tests/UserManagementTests.cs
index a5f027f..2ba0e82 100644
--- a/e2e/Azaion.E2E/Tests/UserManagementTests.cs
+++ b/e2e/Azaion.E2E/Tests/UserManagementTests.cs
@@ -161,14 +161,14 @@ public sealed class UserManagementTests
     }
 
     [Fact]
-    public async Task Registration_rejects_short_email_with_400()
+    public async Task Registration_rejects_empty_email_with_400()
     {
         // Arrange
         using var client = _fixture.CreateAuthenticatedClient(_fixture.AdminToken);
 
         // Act
         using var response = await client.PostAsync("/users",
-            new { email = "ab@c.de", password = "ValidPass123", role = 10 });
+            new { email = "", password = "ValidPass123", role = 10 });
 
         // Assert
         response.StatusCode.Should().Be(HttpStatusCode.BadRequest);