We've been putting this off since the start of the domain renovation
since email is such a hairy problem. Is it time?

Almost all Scheme implementations use either Mailman or Google Groups
for their mailing lists. We could make an experimental Mailman
installation under scheme.org. Any opinions?

The major problem with modern day email is delivery (i.e. landing email
in the inbox instead of having it filtered into the spam folder or
having the mail server reject it).

Our current server at scheme.org (8.9.4.141) is in an IP address space
with a good reputation, but that still doesn't guarantee that Google and
Microsoft won't filter mail originating from this host as spam. I've
read a few sources on the matter, and no outsider seems to be able to
figure out how these companies' filters work. These are proprietary
trade secrets. It seems there's a limit to what mortals can do.

Our basic options are:

1) No mailing lists under scheme.org.

2) Run Mailman on a server with good IP reputation and see what happens.

In earlier times we could have sent our mail through a mass mailing
company like SendGrid, but I hear those now attract mostly spammers.
It's not clear whether they would improve our reputation. They could
well make it worse.

As for the list management software, Mailman is so popular that there
are many communities we can hope to ask for help with it. I don't see
any other self-hosted software being nearly as popular now.