On Sun, 6 Jan 2019 15:47:01 -0700 Grant Taylor via Mailman-Users <mailman-users@python.org> wrote:
> Hi Jim, > > On 1/4/19 3:40 AM, Jim Ziobro wrote: > > Setting up mailing lists in a separate domain has a nice > > administrative appeal. We used to run irix whose sendmail sent every message from host.domain and every A record had to have an adjacent MX record for e-mail to even work. That way lies madness. > > I did a little more research to see how popular that method might > > be. I got a list of 1922 US universities and 457 have a host > > "lists...." and 191 have a host "list..." in their DNS. I surveyed > > a few and ran across: Mailman, Lyris, Sympa, Listserv, Majordomo, > > and Google groups. Many universities outsource their Email to > > Outlook which has it own Group capability. Our university has lyris @ lists.uw, googlegoups, and has recently bought into lookout'365! as well. While we run our own mailman instances. We have "lists" in our little niche. It's the web front-end, our list traffic comes from @domain. So 500 out of 2000 universities having "list(s)" in DNS doesn't really mean all that much. > I think it should be somewhat easy to test the SMTP envelope sender > to see if it's subscribed to a list that is the SMTP envelope > recipient. If the sender is not a subscriber the MTA can reject the > message. Rather trivial with postfix but a) we have bona fide subscribers posting rom their gmail instead of subscribed From: -- I want those to get moderated instead of bounced, b) it is of course subject to spoofing, and c) how much of a problem is it IRL? In our -- admittedly very lightly loaded -- domains, it's RBL and fail2ban that seem to provide best bang for the buck. -- Dmitri Maziuk <dmaz...@bmrb.wisc.edu> ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org