Re: [mailop] [E] Re: problem setting up open-dmarc

[Royce Williams via mailop]

On Wed, Feb 7, 2024 at 7:14 AM Marcel Becker via mailop 
wrote:

> On Wed, Feb 7, 2024 at 7:46 AM Royce Williams via mailop <
> mailop@mailop.org> wrote:
>
>> This only applies if your sending more than 5000 messages per day.
>>> Most smaller senders are still fine using only "SPF *or* DKIM" and do
>>> not *need* a DMARC record:
>>>
>>> https://support.google.com/a/answer/81126
>>> 
>>
>>
>> Unfortunately, this is not correct, despite the official documentation.
>> There are multiple reports on Reddit and other places of people getting the
>> explicit "authentication required" SMTP response at much lower volumes.
>> I've also experienced it directly myself, on domains that I directly
>> control that don't do 50 a day, let alone 5000.
>>
>
> "authentication required" means just that: authenticate your traffic with
> DKIM or SPF. That is required for everybody. DMARC is only required for
> bulk senders. Both the statement you replied to and the official
> documentation is correct.
>

Yep, I was incorrect - turns out my issue was a DKIM problem on my side,
*not* lack of DMARC. Apologies for the noise.

-- 
Royce
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Re: [mailop] [E] Re: problem setting up open-dmarc

[Marcel Becker via mailop]

On Wed, Feb 7, 2024 at 7:46 AM Royce Williams via mailop 
wrote:

> This only applies if your sending more than 5000 messages per day.
>> Most smaller senders are still fine using only "SPF *or* DKIM" and do not
>> *need* a DMARC record:
>>
>> https://support.google.com/a/answer/81126
>> 
>
>
> Unfortunately, this is not correct, despite the official documentation.
> There are multiple reports on Reddit and other places of people getting the
> explicit "authentication required" SMTP response at much lower volumes.
> I've also experienced it directly myself, on domains that I directly
> control that don't do 50 a day, let alone 5000.
>

"authentication required" means just that: authenticate your traffic with
DKIM or SPF. That is required for everybody. DMARC is only required for
bulk senders. Both the statement you replied to and the official
documentation is correct.
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