On Sat, Jan 29, 2022 at 1:01 PM Andrew R Gross <arg5029(a)gmail.com> wrote:
Also, did that message go to the whole channel? Or
just Ruin, Yardena, and Sean?
You are sending emails to "ruin mechanic via sudo-discuss
<sudo-discuss(a)sudoroom.org>" which goes to the whole list, but which
gmail ~helpfully displays as just "ruin" unless you click on it to
show the full address.
DMARC helps servers verify that mail is legit. Messages are signed by
a private key, and the receiver checks it against a public key over
dns. The "from" field has to match the actual sender's domain. When
sudoroom.org sends you mail, it has to say "From: ... sudoroom.org" or
it will fail the test. We can't send mail that says "From: Andrew R
Gross <arg5029(a)gmail.com>" because we don't have the private key for
gmail.com.