Web・ネットワークツール• Email Deliverability
DMARC Record Checker & Validator
Comply with Google and Yahoo 2024 bulk sender email authentication requirements by verifying your domain's DMARC policy record.
Queries public DNS records.
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DMARC Record Checker & Validator の使い方
1
Enter Domain
Input your sending domain name.
2
Query DMARC
Look up `_dmarc.yourdomain.com` TXT record.
3
Analyze Policy
Review enforcement policy (none, quarantine, or reject) and reporting tags.
DMARC Record Checker & Validator について
Fetches TXT records at the `_dmarc.` subdomain prefix, verifying RFC 7489 key-value tags and policy enforcement parameters.
対応フォーマット
DMARCDNS TXT
利用制限
- •Requires public DNS
主な機能
- Google & Yahoo 2024 compliance check
- Policy evaluation: p=none, p=quarantine, p=reject
- Subdomain policy (sp=) and percentage (pct=) verification
- Reporting mailbox (rua= and ruf=) syntax checks
よくある質問
As of 2024, Google and Yahoo reject or spam-flag bulk emails from domains that lack valid SPF, DKIM, and DMARC authentication.
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DNS Lookup & Record Checker
Query authoritative DNS records (A, AAAA, CNAME, MX, TXT, NS, SOA) via secure DNS-over-HTTPS.
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SPF Record Checker & Validator
Validate Sender Policy Framework (SPF) records to prevent email spoofing and ensure delivery to inboxes.
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DKIM Record Checker
Check DKIM public key records by selector to ensure outgoing email cryptographic signature validity.
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