[Emailcore] Re: [Last-Call] Re: Re: draft-ietf-emailcore-as some mail stats

[John R Levine <[e-mail]>]

On Tue, 29 Sep 2026, Michael Richardson wrote:
>
> (I don't think last-call needs this part)
>
> John R Levine <[e-mail]> wrote:
>    > Out of curiosity, I wrote a script similar to SM's that looked at our IMAP
>    > list archive to see how many messages were sent with or without TLS.  For
>    > each message it looks at all the Received: headers, discards irrlevant ones
>    > that use other protocols (MAPI mostly) or are on a single host or look like
>    > submission.  It looked at hops between different hosts and counted how many
>    > were all with ESMTPS or had indications they used TLS, and how many had at
>    > least one non TLS-hop.
>
> (And John asked me offlist about a non-TLS hop in my emails; which is between
> desktop across LAN to MTA.  I poked it so it does TLS now)

Yup, saw that in subsequent mail.

>    > Here's the numbers for the last 90 days for some of our lists.  I was
>    > surprised how many non-TLS messages there were.  I spot checked and as far as
>    > I could tell they were all real messages from people I recognized.
>
> So, are these emails where there was at least one non-TLS hop, or ones where
> there were *no* TLS from sender to IETF?

At least one non-TLS hop over the public Internet.  In nearly all of them 
the hop was the one from the sender to the IETF.

R's,
John