DMARC (Was: Re: [alsa-devel@alsa-project.org: [PATCH 3/5] ASoC: mediatek: mt8195-afe-pcm: Simplify runtime PM during probe])

From: Jaroslav Kysela <perex@perex.cz>
To: Takashi Iwai <tiwai@suse.de>
Cc: Mark Brown <broonie@kernel.org>,
	alsa-devel@alsa-project.org,
	AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>,
	sound-open-firmware@alsa-project.org
Subject: DMARC (Was: Re: [alsa-devel@alsa-project.org: [PATCH 3/5] ASoC: mediatek: mt8195-afe-pcm: Simplify runtime PM during probe])
Date: Tue, 9 May 2023 09:12:55 +0200	[thread overview]
Message-ID: <e76c1395-5eb2-849e-120d-1b7389fc97c7@perex.cz> (raw)
In-Reply-To: <87wn1jdzuq.wl-tiwai@suse.de>

On 08. 05. 23 9:52, Takashi Iwai wrote:
> On Thu, 04 May 2023 09:58:44 +0200,
> Takashi Iwai wrote:
>>
>> On Thu, 04 May 2023 09:35:38 +0200,
>> Takashi Iwai wrote:
>>>
>>> On Thu, 04 May 2023 03:09:45 +0200,
>>> Mark Brown wrote:
>>>>
>>>> Hi,
>>>>
>>>> Here's another mail (one of several in this series) that got completely
>>>> mangled by the alsa-project.org mailman to the point of unusability.  I
>>>> didn't see any response to my last mail about this, is there any news on
>>>> fixing mailman to not do this?  It's extremely disruptive to working
>>>> with lore.
>>>
>>> It seems that alsa-project.org mailman re-sends the post with
>>> xxx@alsa-project.org address sometimes, indeed.  I don't know the
>>> condition, but now I noticed it while checking the pending approvals.
>>
>> And, I guess it happens when a post comes from a non-subscriber.
>> (But not sure whether this happens always...)
>> It waits for approval, but also mangles the sender address and co.
>> This behavior is new after the mail server update.
> 
> Jaroslav, could you investigate it?  I checked again, and it seems
> that all "approved" posts from non-subscribers are modified to the
> sender addresses with alsa-project.org.  I guess there must be some
> option to prevent it.

The answer is DMARC. And the "mangling" applies only to senders which domains 
have restricted DMARC settings (reject or quarantine) - collabora.com has 
quarantine. More information:

https://lore.kernel.org/alsa-devel/6f003598-4cae-a521-233f-2c19eb439359@perex.cz/

I am open to any suggestions, but the default mailman settings (do not do 
anything) causes that some (mostly gmail) users do not receive their e-mails 
because the ALSA's mail server has a bad reputation. Many companies are using 
the google mail service for their domains nowadays.

The information is not lost - the original e-mail is just encapsulated (as an 
attachmnent) to new with the "allowed from" header for DMARC. But yes, it 
requires some more work (reply to the attachment, update scripts).

					Jaroslav

-- 
Jaroslav Kysela <perex@perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.