Configure the following domain and account example to create a catch all domain or account:
1. Create a Standard domain; domain.com.
2. Create a single user account within the domain; catchall.
All mail addressed to domain.com will be deposited in the email@example.com
account where it can be collected via another server or a POP3 client. Note: Do not set this domain as the Primary domain on your server as unknown aliases are always delivered to the primary domain and some relay tests may identify your server as an open relay.