MX Toolbox

Calculates essential diagnostic information for domain names, focusing heavily on mail server records and overall network health. Users input a website or domain name to run a series of comprehensive tests that examine various aspects of its digital infrastructure. The tool checks crucial DNS entries, including MX records, which specify where email should be routed. Furthermore, it performs detailed analyses of email authentication standards such as SPF, DKIM, and DMARC, while also validating the domain against known spam blacklists and testing basic SMTP connectivity. Administrators, web developers, and anyone needing to verify professional digital communication can use this utility. It helps troubleshoot common issues related to email deliverability, ensuring that messages sent from a specific domain are properly authenticated and routed through the intended mail servers.