Check which domains link back to a mail server via API calls to avoid hosts with a dubious reputation, improve email delivery, and other purposes.Get started
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A reverse MX API is a way to check if several domains can be found on a specified mail server through API calls. This information can help verify if a mail server is dedicated or shared across multiple hosts for cybersecurity and marketing ends.
We provide results pulled from our large and constantly updated DNS database with 500+ million MX records updated weekly for billions of domains and subdomains.
Reverse MX API is a fast and easy-to-use API for quick access to domains with a shared mail server. All the results are duly parsed and normalized to a consistent format such as JSON and XML for easy integration into your business processes.
Prevent your mail server from being blacklisted and avoid harm to your email deliverability. Use Reverse MX API to identify bad hosts that may be involved in spamming, phishing, and other malicious activities.
Our passive DNS repository contains billions of historical DNS records for billions of domains and subdomains. Access to our passive DNS database can help you find all there is to know about any Internet property and its DNS records.Order database
Our APIs are available in an enhanced version that offers better performance with a dedicated load balancer and a premium endpoint to enable faster throttling for large-scale API deployments.Learn more
Reverse MX API is available together with reverse NS, IP, and other domain intelligence APIs as part of an annual enterprise subscription with predictable pricing.Learn more