This tool allows quick and easy lookup of a domain names MX records allowing us to determine the mail vendor. eg.
Messagelabs, mimecast, Google or similar.
MXLookups allows you to look up known domains using a specific MX record, a reverse MX lookup. The data available grows daily and is updated regularly providing a clear and current reverse MX lookup record.
No adverts will ever be in this app. It is priced at a cup of coffee, if its useful help support further development by buying this app. The website tools will remain free, with limited access to reverse MXlookups whilst this app has complete access.