MXtoolbox lookup tool

MXtoolbox lookup tool is a Chrome extension that lets you easily check different kinds of records including A, MX, TXT, SPF, SMTP, WHOIS, and Blacklist. Initiate with an A record check by default, just by entering the domain name. You can also look at other records like MX or whois by typing 'mx:' or 'whois:'. For more convenience, you can check A and MX records directly from the context menu. The extension constantly upgrades, with features like an added focus on the input field when opening the popup, fixed icon sizes, resolution of issues with JS files due to security settings and many more being included.