nopSolutions/nopCommerce · warning · NopException

Account.EmailUsernameErrors.EmailTooLong

Error message

Account.EmailUsernameErrors.EmailTooLong

What it means

Thrown by SetEmailAsync when the trimmed email length exceeds 100 characters, using localized resource 'Account.EmailUsernameErrors.EmailTooLong'. The 100-char ceiling is a hard-coded schema/business constraint on the Customer.Email column.

Source

Thrown at src/Libraries/Nop.Services/Customers/CustomerRegistrationService.cs:511

    /// <param name="customer">Customer</param>
    /// <param name="newEmail">New email</param>
    /// <param name="requireValidation">Require validation of new email address</param>
    /// <returns>A task that represents the asynchronous operation</returns>
    public virtual async Task SetEmailAsync(Customer customer, string newEmail, bool requireValidation)
    {
        ArgumentNullException.ThrowIfNull(customer);

        if (newEmail == null)
            throw new NopException("Email cannot be null");

        newEmail = newEmail.Trim();
        var oldEmail = customer.Email;

        if (!CommonHelper.IsValidEmail(newEmail))
            throw new NopException(await _localizationService.GetResourceAsync("Account.EmailUsernameErrors.NewEmailIsNotValid"));

        if (newEmail.Length > 100)
            throw new NopException(await _localizationService.GetResourceAsync("Account.EmailUsernameErrors.EmailTooLong"));

        var customer2 = await _customerService.GetCustomerByEmailAsync(newEmail);
        if (customer2 != null && customer.Id != customer2.Id)
            throw new NopException(await _localizationService.GetResourceAsync("Account.EmailUsernameErrors.EmailAlreadyExists"));

        if (requireValidation)
        {
            //re-validate email
            customer.EmailToRevalidate = newEmail;
            await _customerService.UpdateCustomerAsync(customer);

            //email re-validation message
            await _genericAttributeService.SaveAttributeAsync(customer, NopCustomerDefaults.EmailRevalidationTokenAttribute, Guid.NewGuid().ToString());
            await _workflowMessageService.SendCustomerEmailRevalidationMessageAsync(customer, (await _workContext.GetWorkingLanguageAsync()).Id);
        }
        else
        {
            customer.Email = newEmail;

View on GitHub (pinned to 64bdf2ff08)

Solutions

1. Enforce maxlength=100 on the email input in forms and API models.
2. Validate length before calling: if (newEmail.Trim().Length > 100) report error.
3. If the business requires longer emails, this is a hard-coded limit — file a feature change rather than silently truncating.

Example fix

// before
await _customerRegistrationService.SetEmailAsync(customer, email, requireValidation);

// after
email = email?.Trim();
if (email is { Length: > 100 })
    ModelState.AddModelError(nameof(email), "Email must be 100 characters or fewer.");
else
    await _customerRegistrationService.SetEmailAsync(customer, email, requireValidation);

var trimmed = newEmail?.Trim();
if (trimmed is { Length: > 100 })
    ModelState.AddModelError(nameof(newEmail), "Email must be <= 100 chars.");

static bool IsEmailWithinLimit(string email) => email is null || email.Trim().Length <= 100;

try { await _customerRegistrationService.SetEmailAsync(customer, email, true); }
catch (NopException ex) { ModelState.AddModelError(nameof(email), ex.Message); }

When it happens

Trigger: Calling SetEmailAsync with newEmail whose trimmed length > 100. Happens with very long local parts or unusually long domain segments, or when extra whitespace/content is concatenated.

Common situations: User pastes a malformed long string; an integration syncs a CRM record whose email field is oversized; test data with no length cap.

Related errors

• Account.EmailUsernameErrors.NewEmailIsNotValid
• Account.EmailUsernameErrors.EmailAlreadyExists
• Email cannot be null
• Account.EmailUsernameErrors.UsernameTooLong
• Account.EmailUsernameErrors.UsernameAlreadyExists

AI-assisted analysis of nopSolutions/nopCommerce@64bdf2ff08 (2026-08-13). Data as JSON: /api/errors/a431692638ac12bf. Report an issue: GitHub.