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* [Pricing](/c/products/matrixdos?feature=no-feature-selected&source=pricing)
* [Tools](/SuperTool.aspx)
* [Delivery Center](https://delivery.mxtoolbox.com)
* [Monitoring](/monitoring)
* [Products](/c/mxtoolboxproducts)
* [Blog](https://blog.mxtoolbox.com?source=greynav)
* [Support](/support)
* [SuperTool](/SuperTool.aspx)
* [MX Lookup](/MXLookup.aspx)
* [Blacklists](/blacklists.aspx)
* [DMARC](/dmarc.aspx)
* [Diagnostics](/diagnostic.aspx)
* [Email Health](/emailhealth)
* [DNS Lookup](/DnsLookup.aspx)
* [Analyze Headers](/EmailHeaders.aspx)
* [All Tools](/NetworkTools.aspx)
MX Lookup
=========
* * *
Domain Name
[Solve Email Delivery Problems](https://mxtoolbox.com/c/products/deliverycenter?source=toolhandler-dmarc)
### ABOUT MX LOOKUP
This test will list MX records for a domain in priority order. The MX lookup is done directly against the domain's authoritative name server, so changes to MX Records should show up instantly. You can click [Diagnostics](https://mxtoolbox.com/diagnostic.aspx) , which will connect to the mail server, verify reverse DNS records, perform a simple Open Relay check and measure response time performance. You may also check each MX record (IP Address) against 105 DNS based [blacklists](https://mxtoolbox.com/blacklists.aspx) . (Commonly called RBLs, DNSBLs)