All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated
tool. Input a domain name or IP Address or Host Name.
Links in the results will guide you to other relevant tools and information.
And you'll have a chronological history of your results.
If you already know exactly what you want, you can force a particular test or
lookup. Try some of these examples:
(e.g. "blacklist: 127.0.0.2" will do a blacklist lookup)
Feedback: If you run into any problems with the site or have an
idea that you think would make it better, we would appreciate your feedback.
Please leave us a note in our