My problem is not related to anonymous lists. But messages from my lists are blocked by mailcow/rspamd, unless I set "DMARC mitigation action" to "Wrap the message in an outer message From: the list".
Here is an example: HFILTER_HOSTNAME_UNKNOWN (8.5) R_SPF_FAIL (8) [-all] DMARC_POLICY_QUARANTINE (8) [mydomain.dk : No valid SPF, quarantine] R_DKIM_REJECT (8) [anotherdomain.dk:s=selector1] HFILTER_HELO_BADIP (4.5) [172.19.199.3, 1] VIOLATED_DIRECT_SPF (3.5) FORGED_W_BAD_POLICY (3) HTML_SHORT_LINK_IMG_1 (2) RDNS_NONE (2) ARC_REJECT (0.1) [signature check failed: fail, {[1] = sig:mydomain.dk:reject}] RCVD_NO_TLS_LAST (0.1) MIME_BASE64_TEXT (0.1) BAYES_SPAM (0.00002) [21.41%] RBL_SENDERSCORE_REPUT_9 (-1) [172.19.199.1:from] MAILLIST (-0.2) [mailman] MIME_GOOD (-0.1) [multipart/mixed, multipart/related, multipart/alternative, text/plain] HAS_LIST_UNSUB (-0.01) FROM_HAS_DN (0) RCPT_COUNT_ONE (0) [1] FROM_NEQ_ENVFROM (0) [test@mydomain.dk, test-bounces@mydomain.dk] TO_EQ_FROM (0) FORGED_SENDER_MAILLIST (0) RCVD_COUNT_THREE (0) [3] HAS_REPLYTO (0) [Jesper.Holck@anotherdomain.dk] PREVIOUSLY_DELIVERED (0) [test@mydomain.dk] REPLYTO_DOM_NEQ_FROM_DOM (0) REPLYTO_DOM_NEQ_TO_DOM (0) TO_DN_EQ_ADDR_ALL (0) FORGED_RECIPIENTS_MAILLIST (0) DKIM_TRACE (0) [anotherdomain.dk:-] MISSING_XM_UA (0) FORGED_SENDER (0) [test@mydomain.dk, test-bounces@mydomain.dk] MIME_TRACE (0) [0:+, 1:+, 2:+, 3:+, 4:~, 5:~, 6:+] TAGGED_RCPT (0) BCC (0)