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
500 free credits monthly. No credit card required.
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 the world’s largest and constantly updated DNS database with information on 1,4B+ domains and subdomains, 142,703,533 MX records updated daily.
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.
We maintain a passive DNS database that enables hundreds of billions of historical DNS lookup results for 2 billion hostnames. Access to our passive DNS database can help you find all there is to know about any hostname or IP address.Order database
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