mailing lists

[sdarwin]

Set up a read-only copy of https://lists.boost.org at https://lists.boost.org.cpp.al

More info and discussion about mailing list options:
https://github.com/boostorg/boost-tasks/tree/php7/docs/mailing_lists
https://github.com/boostorg/boost-tasks/tree/php7/docs/mailing_lists/mirror