Backwards Compatibility of Subscribing Methods
Several public domain list manager software programs use this format of subscribing, and Lyris List Manager supports this convention for backward compatibility. It will also accept
email at all the common alternate list manager addresses (such as email@example.com) and act correctly on this email, as if it were sent to the firstname.lastname@example.org address. Lyris List Manger
also supports the majordomo-standard email@example.com address.