Enable "Digest Mode" option for the ruby-talk mailing lists

Hello ruby-talk administrators,

When I try to enable the "Digest Mode" mailing-list option, I get this message:

The list administrator has disabled digest delivery for this list, so your delivery option has not been set.

Would it be possible for the list administrators to enable "digest mode?"

It would be great if this option could be enabled for ruby-core as well.

Kind regards,

— Leif