Real-Time TCP Connections & Comprehensive Infrastructure Diagnostics
Pinpoint the exact technical bottlenecks causing your emails to bounce by running a simultaneous, full-scale diagnostic audit of your sending infrastructure in real-time. We execute live, direct DNS discovery for active Mail Exchanger (MX) records, rigorously enforcing strict SPF and DMARC validation policies while immediately extracting your primary MX IP to securely query the authoritative global Spamhaus ZEN blacklist. Guaranteeing absolute technical accuracy with strictly real-time operations and zero simulated data, our high-performance backend initiates a genuine TCP connection directly to port 25 to definitively verify mandatory STARTTLS encryption readiness, generating an uncompromising Deliverability Health Score with explicit, actionable results to help IT administrators flawlessly resolve complex routing issues and perfect their inbox synergy.
Deliverability requires perfect synergy between your DNS records, mail server configurations, and IP reputation. Run a comprehensive check to audit your MX, SPF, DMARC, STARTTLS readiness, and global blacklist status simultaneously.
Don't check one record at a time. Our engine simultaneously audits all critical components of email deliverability to find the exact reason your messages are bouncing.
STARTTLS. Servers without encryption are heavily penalized by Gmail.Your feedback has been submitted successfully. We appreciate your help in improving our tools.