About MXToolbox
MXToolbox is a set of online tools for checking domain names, DNS records and mail servers. It is used to look up records, test email delivery and see whether a mail server appears on common blacklists.
What it does
You enter a domain and the tool lists its MX records in priority order. The lookup queries the domain's authoritative name server directly. Other tools check a mail server's IP address against a large list of DNS blacklists, verify reverse DNS and run a basic open relay test.
Key features
- Lists MX records for a domain in priority order
- Checks mail server IPs against 105 DNS blacklists
- Diagnostics for reverse DNS and open relay checks
- DMARC and email header analysis tools
- General DNS lookup for any domain
Who it's for
- Email administrators debugging delivery problems
- IT staff checking a domain's mail setup
- Domain owners who want a quick view of their DNS records
Pricing and good to know
The site has a pricing page for its monitoring and delivery products, so check it for the plan that fits your needs. The lookup tools run in a web browser and need no installation. Blacklist results are a snapshot at the time of the check, so run the test again after you fix a problem.
Highlights
- Lists MX records for a domain in priority order
- Checks mail server IPs against 105 DNS blacklists
- Diagnostics for reverse DNS and open relay checks
- DMARC and email header analysis tools
- General DNS lookup for any domain
