Re: Re: Improving Mailing-List interactions - was: [PHP-DEV] Moving PHP internals to GitHub
| From: | Tim Düsterhus | Date: | Thu, 13 Apr 2023 08:50:10 +0000 |
| Subject: | Re: Re: Improving Mailing-List interactions - was: [PHP-DEV] Moving PHP internals to GitHub | ||
| References: | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-120023@lists.php.net to get a copy of this message | ||
Hi
On 4/13/23 10:46, Andreas Heigl wrote:
I understand how DKIM and DMARC works. For users with a DMARC policy of quarantine or reject the list manager already performs DMARC mangling: The 'From' header is changed from the original 'From' header and instead the list address is put there. Now the DMARC policy of the original sender no longer applies and instead the DMARC policy of the list is used (which does not exist). You can see happening with the email from "Mikhail Galanin via internals" that was sent roughly 10 minute ago. Best regards Tim DsüterhusDMARC is less of a concern, because the list apparently already performs DMARC mangling for a policy that is not 'none'Apart from (possibly) modifying the body and the subject line which then breaks the DKIM signature which then breaks DMARC ;-)