MXToolbox
FreeYour free diagnostic tool for email, DNS and network problems
AI Summary
MXToolbox is a comprehensive web-based platform for diagnosing and checking email servers, DNS configurations and network settings. With over 160 different tools, it helps administrators, IT professionals and developers identify and resolve mail delivery problems.
✓ Pros
- + Completely free with over 160 different diagnostic tools
- + No registration required, ready to use immediately
- + Comprehensive database for blacklist checks and reputation verification
✗ Cons
- − User interface appears somewhat outdated and could be more modern
- − Some advanced features or better UX are only available in the paid version
Use Cases
- → Diagnose email delivery problems and check spam blacklist status
- → Validate DNS records (MX, A, CNAME) and find configuration errors
- → Test SMTP connections and troubleshoot authentication issues
- → Check SSL/TLS certificates and validate mail server security
Who is it for?
Ideal for mail administrators, DevOps engineers and IT support teams who need to quickly diagnose and resolve email and network problems.
Tags
What is MXToolbox?
MXToolbox is a web-based diagnostic platform for email servers, DNS configurations and network settings. The platform brings together over 160 individual tools in one place, aimed at anyone who wants to systematically narrow down mail delivery problems or DNS errors. No registration is required. The most important checks can be run immediately, without an account or any setup.
Core features
- MX and DNS validation: A, CNAME and MX records can be queried directly and checked for configuration errors.
- Blacklist check: MXToolbox compares IP addresses and domains against an extensive database of known blocklists and shows the current reputation status.
- SMTP connection test: The SMTP tester establishes a direct connection to the mail server and surfaces authentication issues or connection errors.
- SSL/TLS inspection: Certificates and the TLS configuration of a mail server can be checked for validity and security standards.
- Header analysis: Email headers can be pasted in and parsed automatically, saving considerable time when tracking down the cause of delivery problems.
Who is MXToolbox for?
The platform is aimed at mail administrators, DevOps engineers and IT support teams. Anyone who regularly debugs delivery problems or needs to verify DNS changes after a domain migration will find a focused collection of tools here, with no setup overhead.
Developers integrating mailer services into their own applications often use MXToolbox for quick sanity checks during configuration. The interface is functional, but not designed with a modern look. Users expecting a polished UI will need some time to adjust. Advanced features, including monitoring and improved export options, are reserved for paid accounts.
Context & alternatives
MXToolbox belongs to the category of network and mail diagnostic tools. Comparable platforms cover similar ground, including specialised DNS lookup tools and dedicated deliverability platforms such as GlockApps or Mail Tester. Those focus more heavily on spam scoring and inbox placement. MXToolbox has a broader scope, covering DNS, SMTP and blacklists in a single destination. Anyone who does not need a separate monitoring service and primarily diagnoses on an ad hoc basis will find the free version fully sufficient.
