Re: [dmarc-ietf] Concerns for not Sending a Failure Report?

Steve Atkins <steve@wordtothewise.com> Sun, 04 August 2019 08:07 UTC

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Date: Sun, 4 Aug 2019 09:07:47 +0100
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Subject: Re: [dmarc-ietf] Concerns for not Sending a Failure Report?
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> On Aug 2, 2019, at 10:41 PM, Дилян Палаузов <dilyan.palauzov@aegee.org>; wrote:
> 
> Hello,
> 
> I just thougth once again on this.
> 
> Some of the senders of aggregate reports offer free mailboxes.
> 
> Aggregate reports show that emails from a host to a provider of free mailboxes sometimes do not validate DMARC.
> 
> The one provider sending emails opens a free mailbox on the receiver and then sends a secret copy of each, otherwise
> ordinary delivered email, to that special mailbox.
> 
> Then the mails from that mailbox are downloaded, and the A-R header is checked.  By this way the sender finds out, which
> messages exactly have failed DMARC validation.
> 
> At the end the same information is obtained, that can be obtained by exchanging a failure report: which messages have
> failed.

Information found in mail mail headers in accounts that you have created includes email that's been sent to you.

Information found in failure reports includes email that generally was not sent to you.

Cheers,
  Steve