Mark Sapiro wrote at 12:18 -0700 on May 12, 2016:
On 5/12/16 9:16 AM, email@example.com wrote:
Digest delivery in mailman 2 encapsulated the individual message/rfc822 messages in a multipart/digest container. This allowed email clients to show the messages in the particular digest in a threaded view.
This format vs. plain text digests was a user option in Mailman 2.
It seems like the various digest options that I have tried  in mailman 3.1.0 (as implemented for the fedora-users mailing list) no longer encapsulate messages in multipart/digest.
The core still supports the same plain text and MIME format digests and the same individual subscriber and per-list default formats as did Mailman 2. The issue is none of these things are exposed in Postorius.
If you subscribe to digests on this list, you will receive the 'encapsulated' MIME format because the lists mime_is_default_digest setting is True, but currently that has to be set through the bin/mailman shell tool.
Is this intentional? Is it a bug - feature that was lost in translation from 2 to 3? Is there a delivery option I'm missing that will turn that back on?
Thanks for the info - and Barry's reply as well. I understand that MIME digests are supported in Mailman 3 - that's what I'm using (and thanks, Barry, for the info that Summary Digests is the same right now). My quibble is that the multipart/digest encapsulation level is gone.
Barry Warsaw wrote at 15:16 -0400 on May 12, 2016:
The MIME format of MIME digests should roughly be:
multipart/mixed text/plain (the digest heading) text/plain (the TOC) message/rfc822 message-1 message/rfc822 message-2 ... text/plain (footer)
But mm 2 had:
multipart/mixed text/plain (the digest heading) text/plain (the TOC) multipart/digest <--- this is the part that's gone in mm3 message/rfc822 message-1 message/rfc822 message-2 ... text/plain (footer)
So was that removal intentional, a bug or ??
Maybe you're saying there is definitely an unexposed (in Postorius) knob for that in mm3.
It is the intent that Postorius will eventually expose all these settings. We're not there yet. At present you could possibly do this by interacting with mailmanclient, although I'm not certain the settings are exposed there. You can do it via bin/mailman shell if you have access and know what you're doing (see http://mailman.readthedocs.io/en/release-3.0/src/mailman/runners/docs/digester.html)
If you file an issue at https://gitlab.com/mailman/postorius/issues/new, it might help expedite this.