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Re: DMARC

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Hi,

On 2021-07-10 3:25 a.m., Reco wrote:
> 	Hi.
> 
> On Sat, Jul 10, 2021 at 12:20:24AM -0400, Polyna-Maude Racicot-Summerside wrote:
>> I receive the following regarding messages sent on the mailing list...
> 
> A usual dmarc report, and you receive that because your domain has DMARC
> policy set that way - it's a TXT record _dmarc.polynamaude.com.
> 
> BTW - why have you set "p=none" there?
> 
I'll go read in my note but from memory I don't remember what does
p=none do.
> 
>> Someone understand something ?
> 
> Sure. Every time you send the e-mail to the list, multiple MTAs resent
> your e-mail to whom they deem appropriate.
> The idea of DMARC is to show you, the domain owner, how the world
> perceives e-mails sent on your behalf (or not, considering the spammers).
> 
> This particular dmarc report comes from the FastMail, and it shows,
> along with the other things:
> 
> 1) That your e-mails go through bendel.debian.org, the MTA behind this
> very list (and other Debian lists). There are others MTA there, but
> bendel.d.o is the most important.
> 
> 2) The fact that your DKIM policy is unnecessary strict, because your
> mails to this list routinely fail to verify DKIM.
> 
What you mean unnecessary strict ?
> 3) The fact that your SPF policy is failing, probably because your SPF
> does not designate bendel.d.o as a permitted sender on your behalf.
> 
Oh, I could simply add bendel.d.o and it would work ?
> Also, consider installing dmarc-cat package, it really useful in
> interpreting those DMARC reports, as it shows DMARC report as a
> human-readable text, not XML.
> 
I'll install dmarc-cat and see what it gives out. Probably I'm missing
some stuff.
> Reco
> 

-- 
Polyna-Maude R.-Summerside
-Be smart, Be wise, Support opensource development

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DMARC Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-10 06:30 +0200
  Re: DMARC Reco <recoverym4n@enotuniq.net> - 2021-07-10 09:30 +0200
    Re: DMARC Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-07-10 11:50 +0200
      Re: DMARC Reco <recoverym4n@enotuniq.net> - 2021-07-10 12:00 +0200

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