Bounce action notifications - NANOG mailing list changes yahoo.com users

Fri Oct 10 01:38:39 UTC 2014

On Thu, Oct 9, 2014 at 2:20 PM, Andrew Koch <ak47 at gawul.net> wrote:

> To correct this moving forward, selective rewriting of the from header
> has been recommended, but requires an upgrade to the Mailman software.

If the admins have settled on a best practice, it could help other
Mailman operators like myself.  Two questions spring to mind:

1. With the planned method, how will reply behavior be affected?

2. Will this be an upgrade to 2.1.16, or a pre-release version of
2.1.18, or something else?

>From http://wiki.list.org/display/DEV/DMARC :

In 2.1 16 a from_is_list feature was implemented which if enabled by a
site configuration option would offer a list admin the ability to
either:

* Rewrite (Munge) the From: header with the posters name 'via the
list' and the list's address and merge the poster's address into
Reply-To: or

* Wrap the message as a message/rfc822 sub-part in a MIME format outer
message with From: and Reply-To: as above.

Implemented now for release in 2.1.18 are the following:

* The from_is_list feature from 2.1.16 is always available.

* There are new settings in Privacy options - Sender filters:

** dmarc_moderaction_action is a five valued setting with values

*** Accept - accept the post without rewriting From: or wrapping the message
*** Munge From - rewrite the From: and Reply-To: as in from_is_list
*** Wrap Message - wrap the message as in from_is_list
*** Reject - reject the post
*** Discard - Discard the post

**  dmarc_moderaction_notice is a custom reject message to replace the
default Reject message.

* The above options other than Accept override the from_is_list
setting for messages whose original From: domain publishes a DMARC
policy of p=reject or p=quarantine. A per-list option is available to
limit this to just p=reject or to apply it to either p=reject or
p=quarantine. If the option is Accept, the from_is_list setting
applies.

* There is a site option to set the default for
dmarc_moderaction_action and list admins may not set the action to a
setting which is above the site default in the above list. E.g., if
the site default is Reject, list admins can only set Reject or
Discard; if the site default is Munge From, list admins can select
anything but Accept.

Royce