The WHATWG mailing lists are no longer active.
Discussions now happen on the repositories for the individual standards, and whatwg/meta can be used for issues without a logical home.
A static archive of the firstname.lastname@example.org mailing list 2004-2019 is available, but has a gap in 2014-2017. A searchable and complete archive is also maintained by the W3C.
Static and complete archives of the other lists are also available:
If you've found a broken link to these archives, please file an issue. We may be able to recover it based on context.