On Mon, 14 Dec 2020 18:46:15 +0200 iulian stan wrote: > DKIM-Signature: ... > h=...:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive;
If you sign these headers without adding them all once in your original message, you are signing their absence. This breaks DKIM and DMARC in mailing lists.