Message appearing in inbox despite dmarc quarantine

Pre-checks

• This is not a feature request. Existing functionality does not work as intended, not missing functionality. I will request features via discussions, reddit or support
• I've searched and did not find a similar issue.
• My report does not have personal or private information like email address or recovery code

App version

359.260904.0

Browser

Firefox

Browser version

154.0.1

Operating System

Linux

What happened?

I'm receiving relentless spam emails in a shared mail box from [email protected] despite the DMARC failing. As the DMARC specifies quarantine, these emails should go straight to the spam folder.

Additionally, these emails are obviously spam emails and should be detected by the spam filter but are not. I've reported each one as phishing

Other context

DMARC is:

v=DMARC1; p=quarantine; adkim=s

Email header:

Authentication-Results: w10.tutanota.de (dis=spam; info=dmarc domain policy);
	dmarc=fail (dis=spam p=quarantine; aspf=r; adkim=s; pSrc=domain) header.from=luanti.org