About
MxToolbox provides public diagnostic tools and paid monitoring services for email infrastructure. Its MX lookup checks a domain’s mail exchanger records against authoritative DNS. Related diagnostics test the mail server, reverse DNS, response time and possible open relay behaviour, while blocklist tools check sending IP reputation.
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Delivery Center adds continuous visibility into the services sending on behalf of a domain. It identifies sending sources, analyses SPF and DKIM configuration and alignment, and presents DMARC reports to help administrators review authentication and policy changes. Its adaptive blocklist monitoring follows changes in the sender population and raises alerts when reputation changes.
The service is useful to email administrators managing their own servers as well as third-party CRM, marketing and transactional systems. It also checks BIMI configuration and provides guidance on maintaining domain authentication. MxToolbox offers a public API for integrating its tools and separate support routes for customers.
The sender inventory includes IP geolocation alongside blocklist reputation, helping administrators investigate unfamiliar sending sources.
