Company Overview
MXToolbox was founded in 2004 by Marc "Tech" J. as a side project, headquartered in Brooklyn, New York, USA. MXToolbox is one of the most popular DNS and email diagnostic tool platforms globally. Its MX lookup, blacklist check, and SMTP test tools are widely used by system administrators, email ops teams, and security engineers.
Related provider category: Email Service
Product Matrix
| Product | Description |
|---|---|
| MXToolbox SuperTool | Free online toolset covering MX lookup, blacklist check, SMTP test, and more |
| MXToolbox Lookups | Professional lookup tools supporting blacklist, SPF, DMARC, DKIM checks |
| MXToolbox Delivery Center | Enterprise email delivery monitoring and management platform |
| MXToolbox API | DNS and email diagnostic API for developers |
| MXToolbox Monitoring | Continuous monitoring of DNS and email service health |
Key Milestones
- 2004: MXToolbox launched as a side project, initially offering only MX lookups
- Late 2000s: Expanded to blacklist checks, SMTP tests, and comprehensive diagnostic tools
- 2010s: Launched enterprise Delivery Center and API services, becoming an industry standard
- 2026: Continues to serve global SysAdmins and email ops teams with DNS/email diagnostics
Market Position
MXToolbox holds a leading position in the DNS and email diagnostics tools space, competing with the following tools and services:
| Competitor | Key Feature |
|---|---|
| DNSstuff (SolarWinds) | Enterprise DNS and network diagnostics |
| WhatIsMyIP | Online IP and DNS lookup toolset |
| IntoDNS | DNS health check and configuration analysis |
| DNSSniffer | Online DNS query and diagnostic tools |
| Dig (CLI) | Command-line DNS lookup tool, suitable for advanced users |
