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DMARC PoC

DMARC-Aggregatbericht-Viewer (Machbarkeitsstudie)

schlittermann.de
EN | DE
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Einträge
62
Parsefehler
1
eindeutige Quell-IPs
1
Berichtszeitraum
2026-04-01 — 2026-08-05 02:00:00

Top-10 Quell-IPs

networkcount
UK-MICROSOFT-20060601 107

Top-10 Header-From-Domains

domaincount
ferret.example.com 107

Phase 1 — Erkundung: Wer sendet E-Mail von Ihren Domains? ⓘSie haben p=none veröffentlicht und sammeln Daten. Noch wird nichts blockiert.

Auf Nachrichtenvolumen achten, nicht auf die IP-Anzahl — eine Quelle mit 50 000 Nachrichten ist dringend; eine mit 3 ist Rauschen.

Both-fail-Quellen (DKIM fail UND SPF fail) sind entweder Spoofing-Versuche oder Dienste, die ohne Absprache eingerichtet wurden. Diese zuerst anzeigen.

Eine Domain aufklappen, dann "Nach Quell-IP" öffnen, um die Quadranten je Präfixgruppe zu sehen.

Sender-Übersicht
beide bestanden SPF fail DKIM fail beide fehlgeschlagen
ferret.example.com 107
84% 16%
UK-MICROSOFT-20060601 gesamt 107
IP PTR Total DMARC failures share
2a01:111:f403:c408::3 mail-centralindiaazlp170110003.outbound.protection.outlook.com 107
Enterprise Outlook gesamt 107

Top 10 failing source IPs

countsource IPPTR
17 2a01:111:f403:c408::3ⓘ
domaindispdkimspf#
ferret.example.comrejectfailfail17
 		mail-centralindiaazlp170110003.outbound.protection.outlook.com
source IPheader-fromcount dispositionDKIMSPFreport begin
2a01:111:f403:c408::3 ferret.example.com 4 none pass fail 2026-04-01 02:00
2a01:111:f403:c408::3 ferret.example.com 2 reject fail fail 2026-04-01 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-04-02 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-04-07 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-04-07 02:00
2a01:111:f403:c408::3 ferret.example.com 3 none pass fail 2026-04-08 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-04-08 02:00
2a01:111:f403:c408::3 ferret.example.com 5 none pass fail 2026-04-09 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-04-09 02:00
2a01:111:f403:c408::3 ferret.example.com 7 none pass fail 2026-04-13 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-04-13 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-04-13 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-04-13 02:00
2a01:111:f403:c408::3 ferret.example.com 4 none pass fail 2026-04-15 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-04-16 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-04-22 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-04-23 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-04-23 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-04-29 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-04-29 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-05-05 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-07 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-05-07 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-11 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-05-11 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-05-12 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-18 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-05-18 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-18 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-19 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-05-19 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-20 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-21 02:00
2a01:111:f403:c408::3 ferret.example.com 4 none pass fail 2026-05-26 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-05-27 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-05-27 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-05-28 02:00
2a01:111:f403:c408::3 ferret.example.com 3 none pass fail 2026-06-15 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-06-24 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-06-29 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-06-30 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-07-02 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-06 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-07-06 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-07 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-07-08 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-13 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-07-14 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-07-15 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-07-17 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-20 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-21 02:00
2a01:111:f403:c408::3 ferret.example.com 3 none pass fail 2026-07-22 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-07-24 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-27 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-29 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-07-30 02:00
2a01:111:f403:c408::3 ferret.example.com 1 reject fail fail 2026-07-30 02:00
2a01:111:f403:c408::3 ferret.example.com 3 none pass fail 2026-08-03 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-08-03 02:00
2a01:111:f403:c408::3 ferret.example.com 2 none pass fail 2026-08-05 02:00
2a01:111:f403:c408::3 ferret.example.com 1 none pass fail 2026-08-05 02:00

Phase 2 — Härtung: Was würde brechen, wenn Sie die Richtlinie verschärfen? ⓘSie kennen Ihre Senderlandschaft und wollen von p=none in Richtung p=quarantine oder p=reject gehen. Das Risiko ist Schaden an legitimer Post.

Richtlinienreife % = Anteil der Nachrichten, die heute eine Reject-Richtlinie überleben würden.

SPF-only-Quellen brauchen DKIM-Signierung in ihrem Versanddienst.

DKIM-only-Quellen brauchen eine zu Ihrer From:-Domain passende SPF-Delegation.

Keine DMARC-Ausrichtung-Quellen fallen komplett durch — konfigurieren oder blockieren.

Inkonsistente-Quellen liefern gemischte Ergebnisse — pro IP prüfen.

DMARC-Bereitschaft
beide bestanden SPF fail DKIM fail beide fehlgeschlagen
ferret.example.com 107 / 107
84% 16%
UK-MICROSOFT-20060601 107 / 107
IP PTR Fail / Total DMARC failures share
2a01:111:f403:c408::3 mail-centralindiaazlp170110003.outbound.protection.outlook.com 107 / 107

inconsistent — some records fail

Enterprise Outlook gesamt 107

Top 10 failing source IPs

countsource IPPTR
17 2a01:111:f403:c408::3ⓘ
domaindispdkimspf#
ferret.example.comrejectfailfail17
 mail-centralindiaazlp170110003.outbound.protection.outlook.com
source IPheader-fromcountdispositionDKIMSPFreport begin
2a01:111:f403:c408::3ferret.example.com4none pass fail 2026-04-01 02:00
2a01:111:f403:c408::3ferret.example.com2reject fail fail 2026-04-01 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-02 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-07 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-07 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-04-08 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-08 02:00
2a01:111:f403:c408::3ferret.example.com5none pass fail 2026-04-09 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-09 02:00
2a01:111:f403:c408::3ferret.example.com7none pass fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com4none pass fail 2026-04-15 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-16 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-22 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-23 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-23 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-29 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-29 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-05-05 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-07 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-07 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-11 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-11 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-12 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-18 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-18 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-18 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-19 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-19 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-20 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-21 02:00
2a01:111:f403:c408::3ferret.example.com4none pass fail 2026-05-26 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-27 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-27 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-05-28 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-06-15 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-06-24 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-06-29 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-06-30 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-02 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-06 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-07-06 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-07 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-08 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-13 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-14 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-15 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-07-17 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-20 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-21 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-07-22 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-24 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-27 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-29 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-30 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-07-30 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-08-03 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-08-03 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-08-05 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-08-05 02:00

Phase 3 — Regelbetrieb: Ist etwas kaputt? Wird Ihre Domain missbraucht? ⓘSie haben eine strenge Richtlinie (p=quarantine oder p=reject). Auf Anomalien achten.

Neue Quellen — eine IP, die in den letzten 30 Tagen zum ersten Mal auftaucht und vorher nicht gesehen wurde. Kann ein neuer legitimer Sender sein oder der Beginn eines Spoofing-Angriffs.

Aktive Fehler — Quellen, die in den letzten 30 Tagen unter strenger Richtlinie weiter DMARC-fehlerhaft sind. Dauerhafte Fehler mit hohem Volumen sind entweder Spoofing oder ein falsch konfigurierter legitimer Dienst.

Wenn ein großer Melder (Google, Microsoft) verschwindet, könnte Ihre rua=-Adresse bouncen.

Ausrichtungsgesundheit — letzte 30 Tage
beide bestanden SPF fail DKIM fail beide fehlgeschlagen
05-11
05-12
05-18
05-19
05-20
05-21
05-26
05-27
05-28
06-15
06-24
06-29
06-30
07-02
07-06
07-07
07-08
07-13
07-14
07-15
07-17
07-20
07-21
07-22
07-24
07-27
07-29
07-30
08-03
08-05
ferret.example.com 8 / 60
87% 13%
05-11
05-12
05-18
05-19
05-20
05-21
05-26
05-27
05-28
06-15
06-24
06-29
06-30
07-02
07-06
07-07
07-08
07-13
07-14
07-15
07-17
07-20
07-21
07-22
07-24
07-27
07-29
07-30
08-03
08-05
UK-MICROSOFT-20060601 Fehler 8 / 60
IP PTR Fail / Total DMARC failures share
2a01:111:f403:c408::3 mail-centralindiaazlp170110003.outbound.protection.outlook.com 8 / 60
Enterprise Outlook gesamt 107

Top 10 failing source IPs

countsource IPPTR
17 2a01:111:f403:c408::3ⓘ
domaindispdkimspf#
ferret.example.comrejectfailfail17
 mail-centralindiaazlp170110003.outbound.protection.outlook.com
source IPheader-fromcountdispositionDKIMSPFreport begin
2a01:111:f403:c408::3ferret.example.com4none pass fail 2026-04-01 02:00
2a01:111:f403:c408::3ferret.example.com2reject fail fail 2026-04-01 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-02 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-07 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-07 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-04-08 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-08 02:00
2a01:111:f403:c408::3ferret.example.com5none pass fail 2026-04-09 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-09 02:00
2a01:111:f403:c408::3ferret.example.com7none pass fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-13 02:00
2a01:111:f403:c408::3ferret.example.com4none pass fail 2026-04-15 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-16 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-22 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-23 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-04-23 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-04-29 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-04-29 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-05-05 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-07 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-07 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-11 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-11 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-12 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-18 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-18 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-18 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-19 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-19 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-20 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-21 02:00
2a01:111:f403:c408::3ferret.example.com4none pass fail 2026-05-26 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-05-27 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-05-27 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-05-28 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-06-15 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-06-24 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-06-29 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-06-30 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-02 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-06 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-07-06 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-07 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-08 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-13 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-14 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-15 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-07-17 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-20 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-21 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-07-22 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-07-24 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-27 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-29 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-07-30 02:00
2a01:111:f403:c408::3ferret.example.com1reject fail fail 2026-07-30 02:00
2a01:111:f403:c408::3ferret.example.com3none pass fail 2026-08-03 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-08-03 02:00
2a01:111:f403:c408::3ferret.example.com2none pass fail 2026-08-05 02:00
2a01:111:f403:c408::3ferret.example.com1none pass fail 2026-08-05 02:00