Protect your domain from spoofing, phishing, and blacklisting. Comprehensive security analysis and monitoring tools.
Attackers forge your domain to send malicious emails that appear to come from you.
Fraudulent emails designed to steal credentials or install malware.
Targeted attacks impersonating executives or trusted partners.
Your IPs get blocked by spam filters, preventing legitimate email delivery.
Check if your IP address or domain is listed on email blacklists. Monitor your reputation across 10+ major blacklists in real-time.
Check if a domain has MTA-STS (Mail Transfer Agent Strict Transport Security) configured for secure email transmission.
Analyze your DMARC policy configuration and get recommendations for improving your email security posture.
Validate your SPF record for syntax errors, DNS lookup limits, and best practices. Ensure your SPF is working correctly.
Follow these best practices to protect your domain and improve email deliverability.
DMARC is your first line of defense against email spoofing. Start with p=none, then progress to reject.
Authorize your legitimate email sources with SPF. Keep under 10 DNS lookups.
Sign your emails with DKIM to prove they haven't been tampered with in transit.
Regularly check if your IPs are blacklisted. Address issues immediately.
Enforce TLS with MTA-STS to encrypt email in transit and prevent downgrade attacks.
Analyze DMARC reports to identify unauthorized senders and improve your policy.
Common questions about email security and protection.
IPs can be blacklisted for sending spam, having compromised accounts, poor email practices, or being in a bad IP neighborhood. Our blacklist checker shows which lists you're on and provides delisting guidance.
MTA-STS (Mail Transfer Agent Strict Transport Security) is a security standard that enforces TLS encryption for email transmission and prevents downgrade attacks.
Implement DMARC with a reject policy, properly configure SPF, and enable DKIM. This combination prevents attackers from sending emails that appear to come from your domain.
Start with p=none to monitor, then p=quarantine to send failures to spam, and finally p=reject for full protection. Use our DMARC analyzer to check your current setup.