Groups by E-mail?

I noted that the "users" Google Group was closed. There must have been something it "did" (meaning convenient access via e-mail) for people that now perhaps is supported by elgg Groups more natively?

Are you aware of any elgg plugins that support either:

1. Full text e-mail versions of group posts sent out individually or in daily digests - If yes, I assume people get a link to visit the website where they can reply.

2. The ability to reply by e-mail to an individual post without having the visit the web site for ease of use/greater participation.

Steven Clift