MxToolBox is described as '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 is a website monitoring tool in the network & admin category. There are more than 25 alternatives to MxToolBox, not only websites but also apps for a variety of platforms, including SaaS, Windows, Linux and Self-Hosted apps. The best MxToolBox alternative is Domain Digger, which is both free and Open Source. Other great sites and apps similar to MxToolBox are Pingdom, techkit.net, HetrixTools and Upzilla.
DNS Check is an application which compares the DNS records that you enter to what nameservers are returning in response to queries. If there's an issue, DNS Check will notify you, and enable you to quickly identify what it is. Issues which can be detected include:
Statusdroid operates a worldwide network of servers which checks your website every 30 seconds from over 15 worldwide locations.
Elyzer is an e-mail header analyzer capable of detecting potential spoofing attempts. It will give you general information about the e-mail, the route it took, important security headers and the phishing / spoofing results.
