Hello @mbv,
Greetings from WebToffee support. Thanks for reaching out.
We understand your query. Currently, the plugin doesn’t auto-apply the coupons to the guest users or other logged-in users if there are restrictions in the?Allowed email?option. This is implemented to prevent any misuse of coupons as the coupon can be applied by anyone if they gain access to the email address associated with it.
Entering the same email address on the Billing email field on the checkout page will let them use any coupon with the Allowed email restriction. This feature is provided by WooCommerce. So we can’t do anything against it.
Because of this reason, we decided it was best to remove the auto-apply feature of the coupon to the guest users if there are any email restrictions.
The coupon will be automatically applied only to the logged-in user to whom it belongs. However, coupons without email restrictions can be applied to guest users as well. I hope this clarifies your query.
If you have any other questions or need further assistance, please feel free to ask.