Several protocols now in wide use attempt to ensure that use
of the domain in the author's address (ie, in the From: header
field) is authorized by that domain. These protocols may be
incompatible with common list features such as footers, causing
participating email services to bounce list traffic merely
because of the address in the From: field. <b>This has resulted
in members being unsubscribed despite being perfectly able to
receive mail.</b>
<p>
The following actions are applied to all list messages when
selected here. To apply these actions only to messages where the
domain in the From: header is determined to use such a protocol,
see the <a
href="?VARHELP=privacy/sender/dmarc_moderation_action">
dmarc_moderation_action</a> settings under Privacy options...
-> Sender filters.
<p>Settings:<p>
<dl>
<dt>No</dt>
<dd>Do nothing special. This is appropriate for anonymous lists.
It is appropriate for dedicated announcement lists, unless the
From: address of authorized posters might be in a domain with a
DMARC or similar policy. It is also appropriate if you choose to
use dmarc_moderation_action other than Accept for this list.</dd>
<dt>Munge From</dt>
<dd>This action replaces the poster's address in the From: header
with the list's posting address and adds the poster's address to
the addresses in the original Reply-To: header.</dd>
<dt>Wrap Message</dt>
<dd>Just wrap the message in an outer message with the From:
header containing the list's posting address and with the original
From: address added to the addresses in the original Reply-To:
header and with Content-Type: message/rfc822. This is effectively
a one message MIME format digest.</dd>
</dl>
<p>The transformations for anonymous_list are applied before
any of these actions. It is not useful to apply actions other
than No to an anonymous list, and if you do so, the result may
be surprising.
<p>The Reply-To: header munging actions below interact with these
actions as follows:
<p> first_strip_reply_to = Yes will remove all the incoming
Reply-To: addresses but will still add the poster's address to
Reply-To: for all three settings of reply_goes_to_list which
respectively will result in just the poster's address, the
poster's address and the list posting address or the poster's
address and the explicit reply_to_address in the outgoing
Reply-To: header. If first_strip_reply_to = No the poster's
address in the original From: header, if not already included in
the Reply-To:, will be added to any existing Reply-To:
address(es).
<p>These actions, whether selected here or via <a
href="?VARHELP=privacy/sender/dmarc_moderation_action">
dmarc_moderation_action</a>, do not apply to messages in digests
or archives or sent to usenet via the Mail<->News gateways.
<p>If <a
href="?VARHELP=privacy/sender/dmarc_moderation_action">
dmarc_moderation_action</a> applies to this message with an
action other than Accept, that action rather than this is
applied