What is rule: KP_LIST_ID_DOMAIN_IN_RACKETS?

[Jari Fredriksson]

-15 KP_LIST_ID_DOMAIN_IN_BRACKETS List-id has domain in angle
                            brackets

This exists in lots and lots of my spam, and that -15 its seems very odd…

This appeared with 3.4.2 last week…

br. jarif