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According to Live Direct Marketing's daily DNS scan (July 12, 2026), mdr.de (Tranco rank #6,579) receives mail via Microsoft 365 and sends through Mailjet (Sinch), Constant Contact. Its DMARC policy is p=none (monitor only) — like the majority of DMARC publishers (53% don't enforce).
| Mailbox provider (MX) | Microsoft 365 |
|---|---|
| ESPs in SPF | Mailjet (Sinch), Constant Contact |
| SaaS senders in SPF | Umantis (Haufe HR) |
| DMARC policy | p=none |
| DMARC record | v=DMARC1; p=none; rua=mailto:dmarc-reports@mdr.de; pct=100; sp=none; aspf=r; adkim=r |
| Tranco rank | #6,579 |
| Snapshot | 2026-07-12 (updated daily) |
mdr.de uses Microsoft 365 for inbound mail (detected from its primary MX record) as of July 12, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
mdr.de authorises Mailjet (Sinch), Constant Contact in its SPF record as of July 12, 2026.
No — mdr.de publishes p=none, which only monitors and does not block spoofing (as of July 12, 2026).