[Mailman-Users] accept_these_nonmembers for umbrella lists

Gretchen R Beck cmupythia at cmu.edu
Thu Jan 5 17:03:48 EST 2017

Thanks Mark,

USE_ENVELOPE_SENDER=No (we haven't changed it)
For the lists in question both have from_is_list=No and dmarc_moderation_action=1 (the system defaults)

Adding the @list1 to the non-members  on list2 works, but I have admins here who have one or two users (usually faculty) who want to post to the umbrellas but don't want to be subscribed to anything. While subscribe + no-mail works, most of these admins tend to go to accept_these_nonmembers first, so I'm trying to figure out what's preventing it from working in this instance on our site (we're on 2.1.18-1 with some local customization so the usual caveats there). 

From: Mailman-Users <mailman-users-bounces+cmupythia=cmu.edu at python.org> on behalf of Mark Sapiro <mark at msapiro.net>
Sent: Thursday, January 5, 2017 4:22 PM
To: mailman-users at python.org
Subject: Re: [Mailman-Users] accept_these_nonmembers for umbrella lists

On 01/05/2017 12:58 PM, Gretchen R Beck wrote:
> I have an umbrella list.  My address (cmupythia at cmu.edu) is a member of the parent list (list1), and on the accept_these_nonmembers on the second list (list2). It is NOT subscribed to list2
> When I post to list2 directly, the post is accepted and delivered. When I post to list1, the post is held for moderation by list2 as a non-member poster.
> Default.py has SENDER_HEADERS = ('from', None, 'reply-to', 'sender')  and these are not changed in mm_cfg.py

The article at <https://wiki.list.org/x/4030574> may help.

The most likely explanation is that you have


in mm_cfg.py. This means that list2 is checking the Sender: header value
against the accept_these_nonmembers list and the Sender: header has the
list1-bounces address, not yours.

There are other possibilities depending on various settings of list1.
Note that cmu.edu publishes DMARC p=none, so it's possible that list1 is
munging the From: header depending on DMARC settings.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan
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