Free Domain Security Checkup
Troubleshoot email delivery problems, fix emails going to spam, and verify your SPF, DKIM, and DMARC records instantly. No signup required.
100% Free · No data collected · Results in seconds
Endpoint: https://api.nhmohio.com/?domain=DOMAIN
Method: GET | Format: JSON | Auth: None Required
View API DocumentationWhy Check Your SPF, DKIM, and DMARC Records?
Email authentication records are essential for protecting your domain's reputation and ensuring your messages reach recipients' inboxes. Without properly configured SPF, DKIM, and DMARC records, you're leaving your business vulnerable to email delivery failures, spam filtering, and security threats.
Email Delivery Problems
If your emails are going to spam, bouncing, or not being delivered at all, incorrect authentication records are likely the culprit.
- Emails landing in spam folders instead of inboxes
- Recipients not receiving important transactional emails
- Marketing campaigns with poor deliverability rates
Protect Against Email Spoofing
Without proper email authentication, cybercriminals can easily spoof your domain to send phishing emails that appear to come from your business.
- Prevent unauthorized use of your domain
- Stop phishing attacks that impersonate your business
- Protect your customers from fraudulent messages
Improve Email Deliverability
Email service providers use authentication records as a key factor in determining whether to accept, quarantine, or reject messages.
- Higher inbox placement rates for marketing campaigns
- Better sender reputation scores
- Reduced false positive spam filtering
Compliance and Professional Standards
Many industries require proper email authentication as part of compliance standards.
- Meet industry compliance requirements
- Demonstrate technical security best practices
- Professional standards for business email
Why Domain Security Matters for Your Business
Email security is critical for every business, but many small businesses don't realize their email domain security settings can prevent legitimate emails from reaching customers' inboxes. When your domain lacks proper SPF, DKIM, and DMARC records, your emails are more likely to be marked as spam or rejected entirely by email providers.
SPF (Sender Policy Framework) records tell email servers which servers are authorized to send emails on behalf of your domain. DKIM (DomainKeys Identified Mail) adds a digital signature to your emails to verify they haven't been tampered with. DMARC (Domain-based Message Authentication, Reporting & Conformance) policies tell receiving servers what to do with emails that fail SPF or DKIM checks - whether to quarantine, reject, or allow them through.
Without these records properly configured, your business emails may never reach your customers, clients, or partners. This can result in lost sales, missed opportunities, and damaged professional relationships. Our free domain security checkup tool helps you identify email security issues before they impact your business communications.
Need Help Fixing Email Security Issues?
Our team can help you configure SPF, DKIM, and DMARC records to ensure your business emails reach their destination every time.