Report Details

Summary: { "summary": "Domain liedelt.immo has 100% SPF failure rate (3/3 emails) from three closely related IPs in the 69.169.224.x range, though DKIM authentication is passing. Despite the policy being set to 'reject', no emails were actually rejected, indicating a potential policy enforcement gap. The consistent SPF failures from a narrow IP range suggest these are likely legitimate mail servers that need SPF record updates.", "severity": "high", "failures": [ "IP 69.169.224.14: 1 email with SPF failure - Server not authorized in SPF record, but DKIM passed. DMARC evaluation passed due to DKIM alignment with relaxed mode.", "IP 69.169.224.17: 1 email with SPF failure - Server not authorized in SPF record, but DKIM passed. DMARC evaluation passed due to DKIM alignment with relaxed mode.", "IP 69.169.224.18: 1 email with SPF failure - Server not authorized in SPF record, but DKIM passed. DMARC evaluation passed due to DKIM alignment with relaxed mode." ], "unauthorized_sources": [ "IP range 69.169.224.14-18: Three consecutive IPs in this range are sending mail but not listed in SPF. This appears to be a mail server cluster or load-balanced infrastructure that needs SPF authorization. The IPs belong to a legitimate hosting provider's range, suggesting these are your authorized mail servers." ], "anomalies": [ "Policy enforcement discrepancy: Domain policy is set to 'reject' but no emails were rejected despite SPF failures. Emails passed overall DMARC due to DKIM alignment in relaxed mode, which overrides the reject policy when at least one authentication method aligns.", "Consistent SPF failure pattern: 100% SPF failure rate across all three emails from related IPs suggests systematic configuration issue rather than sporadic spoofing attempts.", "Low email volume: Only 3 emails in this reporting period may indicate this is a new domain, testing phase, or low-traffic domain." ], "recommendations": [ "Add the 69.169.224.x IP range to your SPF record immediately to achieve both SPF and DKIM authentication alignment", "Investigate and document which mail service provider uses the 69.169.224.x range to ensure these are authorized sending sources", "Consider implementing SPF alignment mode to 'strict' once SPF issues are resolved for enhanced security", "Monitor DMARC reports for the next 2-4 weeks after SPF updates to verify full authentication success", "Document your authorized sending infrastructure to prevent future configuration gaps" ], "action_items": [ { "priority": "critical", "title": "Identify Mail Service Provider for IP Range 69.169.224.x", "description": "Before updating SPF records, confirm that IPs 69.169.224.14-18 belong to your authorized mail service provider. These IPs are currently sending mail with valid DKIM signatures but failing SPF, indicating they are likely legitimate but misconfigured.", "steps": [ "Perform WHOIS lookup on 69.169.224.14 to identify the organization (use: whois 69.169.224.14)", "Check your email infrastructure documentation to confirm if this provider is authorized", "Contact your IT team or email administrator to verify if this IP range is part of your mail infrastructure", "Review recent email service provider changes or migrations that might explain new sending IPs", "If IPs are unrecognized, check with marketing, sales, or other departments that might use email services" ], "affected_ips": ["69.169.224.14", "69.169.224.17", "69.169.224.18"], "expected_outcome": "Confirmation of whether these IPs are authorized senders or potential security threats. This determines whether to add them to SPF or investigate as unauthorized access." }, { "priority": "critical", "title": "Update SPF Record to Include Missing IP Range", "description": "Once verified as legitimate, add the 69.169.224.x range to your SPF record to eliminate the 100% SPF failure rate. This will provide dual authentication (SPF + DKIM) for better email deliverability and security.", "steps": [ "Access your DNS management console for liedelt.immo", "Locate the current SPF TXT record (starts with 'v=spf1')", "Add 'ip4:69.169.224.0/24' to include the entire /24 subnet, or add individual IPs if preferred: 'ip4:69.169.224.14 ip4:69.169.224.17 ip4:69.169.224.18'", "Ensure the SPF record ends with '~all' or '-all' mechanism", "Verify the updated record doesn't exceed 255 characters and has fewer than 10 DNS lookups", "Save changes and verify propagation using: 'dig TXT liedelt.immo' or 'nslookup -type=TXT liedelt.immo'", "Wait 24-48 hours for full DNS propagation" ], "affected_ips": ["69.169.224.14", "69.169.224.17", "69.169.224.18"], "expected_outcome": "SPF authentication will pass for emails from these IPs, achieving 100% DMARC compliance with both SPF and DKIM passing. This improves sender reputation and email deliverability." }, { "priority": "high", "title": "Verify DMARC Policy Alignment with Business Intent", "description": "Your policy is set to 'reject' but you're relying solely on DKIM for DMARC passage. Ensure this configuration aligns with your risk tolerance and email delivery requirements.", "steps": [ "Document current policy: p=reject with relaxed alignment for both SPF and DKIM", "Confirm that 'reject' policy is intentional for your business needs (strictest policy)", "Review if current reliance on DKIM-only authentication is acceptable or if dual authentication is preferred", "Consider if 'quarantine' policy might be more appropriate during the SPF fix period", "Verify DMARC reporting email addresses (rua and ruf tags) are monitored regularly", "Schedule policy review meeting with email administrators and security team" ], "affected_ips": [], "expected_outcome": "Clear understanding of whether current policy matches organizational risk appetite. May result in temporary policy adjustment to 'quarantine' until SPF is fixed, or confirmation that current setup is acceptable." }, { "priority": "medium", "title": "Implement Enhanced DMARC Monitoring", "description": "With only 3 emails in this report, establish better monitoring to catch authentication issues quickly and verify the SPF fixes are effective.", "steps": [ "Set up automated parsing of DMARC reports using a DMARC analysis tool (e.g., Postmark, Dmarcian, or open-source solutions)", "Configure alerts for SPF/DKIM failure rates exceeding 5%", "Set up alerts for any new unauthorized IP addresses sending mail", "Create a weekly review schedule for DMARC reports", "Document baseline metrics: current legitimate sending sources, expected volume, authorized IPs", "After SPF update, monitor for 30 days to confirm 100% authentication success rate" ], "affected_ips": [], "expected_outcome": "Proactive detection of authentication issues before they impact deliverability. Clear visibility into email authentication health and faster response to configuration problems or spoofing attempts." }, { "priority": "medium", "title": "Audit Complete Email Sending Infrastructure", "description": "The discovery of three unauthorized IPs suggests incomplete documentation of sending sources. Conduct a full audit to prevent future SPF gaps.", "steps": [ "List all known email sending services (corporate mail server, marketing platforms, CRM systems, notification services)", "For each service, document authorized IP addresses or SPF include statements", "Review DMA