DMarkyMARC

DSG DMARC standard

Checks _dmarc.<domain> against the DSG standard and returns PASS or FAIL, with the reason. Resolved over DNS-over-HTTPS at 1.1.1.1.

Advanced options

Verify external destination authorization (RFC 7489 §7.1) An extra lookup per off-domain destination. Without the authorizing record, conforming receivers discard the reports.

Show the full record for passing domains in a list run Off by default: only warnings and failures get a detail card under the table.

Domains checked at once in a list run Lower this if a large batch starts timing out.

These reset every time the page loads.

The standard being enforced

Loading the current rules…