Scan your domain's authentication records. See what's configured—and what's missing—before your emails hit spam.
Works with: Gmail, Outlook, Yahoo, Zoho, iCloud, and all providers.
Whether you're sending cold emails, marketing campaigns, or transactional messages—authentication issues hurt your deliverability.
Each of these DNS records plays a critical role in whether your emails reach the inbox or land in spam.
Based on thousands of domain scans, these are the most frequent issues hurting email deliverability.
Data based on aggregated scans. Individual domain results may vary.
SPF (Sender Policy Framework) is a DNS record that specifies which mail servers are authorized to send email on behalf of your domain. Without SPF, receiving servers can't verify if emails claiming to be from your domain are legitimate, increasing the chance they'll be marked as spam or rejected entirely.
DKIM (DomainKeys Identified Mail) adds a digital signature to your emails that proves they haven't been tampered with during transit. When a receiving server verifies your DKIM signature, it confirms the email is authentic and unaltered, which significantly improves your deliverability and sender reputation.
DMARC (Domain-based Message Authentication, Reporting & Conformance) tells receiving servers what to do when emails fail SPF or DKIM checks. It's essential for protecting your domain from spoofing and phishing attacks. Major email providers like Gmail and Yahoo now require DMARC for bulk senders.
Emails typically land in spam due to missing or misconfigured authentication (SPF, DKIM, DMARC), poor sender reputation, spammy content, or sending from a new domain without proper warmup. Our free scanner checks your authentication setup to identify the most common technical issues.
DNS changes for SPF, DKIM, and DMARC typically propagate within 24-48 hours. However, rebuilding sender reputation after deliverability problems can take 2-4 weeks of consistent, proper sending practices. The sooner you identify and fix issues, the faster you'll see improvements.
Yes! Our basic email authentication scanner is completely free with no signup required. You can instantly check your SPF, DKIM, and DMARC records and see your spam risk score. We offer premium features like detailed fix instructions and provider-specific verdicts for users who need deeper analysis.
Use a blacklist checker tool to query major blocklists like Spamhaus, Barracuda, and SORBS. If your domain or IP appears on any list, you'll need to identify the cause (usually spam complaints or compromised accounts), fix the issue, and submit a delisting request to each blacklist operator.
SPF verifies that the sending server is authorized to send email for your domain—it checks the IP address. DKIM verifies the email content hasn't been altered in transit using cryptographic signatures. Both are complementary: SPF validates the sender, DKIM validates the message integrity. You need both for proper email authentication.
Yes, for optimal deliverability you need all three. SPF authorizes your sending servers, DKIM signs your emails cryptographically, and DMARC ties them together with a policy for handling failures. Gmail, Yahoo, and now Microsoft require all three for bulk senders (5,000+ emails/day).
Sender reputation improves through consistent authentication (SPF, DKIM, DMARC), low bounce rates (under 2%), minimal spam complaints (under 0.3%), proper list hygiene, and gradual sending volume increases. Monitor your reputation using Google Postmaster Tools and Microsoft SNDS.
DMARC p=none is a monitoring-only policy—it collects reports about authentication failures but doesn't instruct receivers to block or quarantine failing emails. It's a good starting point for visibility, but you should progress to p=quarantine or p=reject for actual protection against spoofing.
Yes! Use MailRisk to scan your domain's authentication setup before any campaign. This pre-flight check shows you SPF, DKIM, and DMARC status, identifies configuration issues, and estimates your spam risk—all before a single email is sent.