(Use Case) Restrict Orders from Carrier Email Addresses

This is a configuration example for restricting orders placed using Japanese carrier email addresses (docomo, au, SoftBank, etc.).

Use case

Use this when you want to restrict orders placed with carrier email addresses to prevent order-related issues caused by undeliverable emails.

Result

Customer status	Result	Reason
Order with a non-carrier email address	Allowed	Domain is not on the restriction list
Order with a carrier email address	Not allowed	Domain matches the restriction list

Configuration example

Field	Value
① Title	Enter any title
② Limit details > Order email address	Japanese carrier email domains (select from preset)
③ Eligible items	All items
④ Product message	(Leave blank)
⑤ Alert message > Display timing	Fixed to Checkout only (cannot be changed)
⑤ Alert message > Message	Enter any message

When email domain restriction is used, the alert message Display timing is automatically fixed to Checkout only. Displaying an error on the cart page is not supported.

Email domains are matched using a suffix match. Setting "example.com" will also restrict "sub.example.com".