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According to Live Direct Marketing's daily DNS scan (July 13, 2026), mailbox.org (Tranco rank #11,739) receives mail via Mailbox.org. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.
| Mailbox provider (MX) | Mailbox.org |
|---|---|
| ESPs in SPF | none detected |
| SaaS senders in SPF | none detected |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1; p=reject; adkim=r; aspf=r; pct=100; rua=mailto:abuse+arf@heinlein-support.de; rf=afrf; fo=1; |
| Tranco rank | #11,739 |
| Snapshot | 2026-07-13 (updated daily) |
mailbox.org uses Mailbox.org for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
Yes — mailbox.org publishes p=reject, the strictest DMARC policy (as of July 13, 2026).