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<h1 class="tool-single__title">SPF/DKIM/DMARC-Checker</h1>
<p class="tool-single__lead">SPF/DKIM/DMARC-Checker: Prüfe, ob deine Domain gegen E-Mail-Spoofing geschützt ist – SPF, DKIM und DMARC auf einen Blick.</p>
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<div class="smi-tool" data-tool="mail-security" data-tier="B" role="region" aria-label="SPF/DKIM/DMARC-Checker"><noscript></p>
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<p>Ohne SPF, DKIM und DMARC kann praktisch jeder E-Mails im Namen deiner Domain versenden – ein Einfallstor für Phishing und Rufschädigung. Dieser <strong>SPF/DKIM/DMARC-Checker</strong> prüft alle drei Schutzmechanismen deiner Domain auf einen Blick.</p>
<h2>So funktioniert SPF/DKIM/DMARC-Checker</h2>
<ol>
<li>Domain eingeben (z. B. deine-firma.de).</li>
<li>Optional einen DKIM-Selector angeben.</li>
<li>„Prüfen“ klicken und die drei Ergebnisse auswerten.</li>
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<h2>Wann ist das nützlich?</h2>
<ul>
<li>E-Mail-Zustellbarkeit verbessern</li>
<li>Domain vor Spoofing/Phishing schützen</li>
<li>Mail-Konfiguration von Kunden prüfen</li>
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<summary class="vpn-faq__q">Was sind SPF, DKIM und DMARC?</summary>
<div class="vpn-faq__a">SPF legt fest, welche Server fu00fcr deine Domain senden du00fcrfen. DKIM signiert E-Mails kryptographisch. DMARC verbindet beide und legt fest, wie mit gefu00e4lschten Mails umzugehen ist.</div>
</details>
<details class="vpn-faq__item">
<summary class="vpn-faq__q">Was passiert ohne diese Eintru00e4ge?</summary>
<div class="vpn-faq__a">Angreifer ku00f6nnen E-Mails in deinem Namen versenden (Spoofing), deine Mails landen hu00e4ufiger im Spam und dein Ruf leidet.</div>
</details>
<details class="vpn-faq__item">
<summary class="vpn-faq__q">Welche DMARC-Policy ist empfehlenswert?</summary>
<div class="vpn-faq__a">Beginne mit p=none zum Beobachten und steigere dich u00fcber p=quarantine bis p=reject fu00fcr vollen Schutz.</div>
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<p><i class="bi bi-shield-check" aria-hidden="true"></i> In der EU verarbeitet · wir speichern deine Eingaben nicht.</p>
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