Reverse MX Lookup gives you a list of all domains hosted on a mail server of interest in seconds. Use this information for cybersecurity, optimizing email operations, and more.
Our reverse MX lookup tool has access to a comprehensive database that contains information on billions of domains and subdomains and their MX records.
Each lookup reveals the number of MX records related to the mail server of interest and provides a list of all the domains connected to it, along with details on when their MX records were last updated.
Sharing a mail server with a malicious domain can be detrimental to your organization’s reputation and can very well cause your domain’s inclusion in a blacklist. Use Reverse MX Lookup to get a list of all your mail server co-occupants so you can do thorough background checks on them. Make sure none of them are known spammers, phishers, or malware hosts.
Cybercriminals sometimes get into target networks undetected by taking control of so-called “dangling records.” These can include MX records for subdomains that are left unprotected because they are no longer in use. Use Reverse MX Lookup to keep track of domains and subdomains that may have slipped into the cracks.
Being associated with a malicious mail server can result in email deliverability drops and hit your bottom line. Reverse MX Lookup can let you know about all new domains added to a mail server so you can identify and take further actions against bad online neighbors.
Our passive DNS database downloads are available in CSV files with all connections between MX or other DNS records and domains and subdomains for over a decade.Order database