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About MXToolbox
MXToolbox is a web-based diagnostic suite for DNS and email. Its MX lookup lists a domain's mail exchanger records in priority order. It queries the authoritative name server directly, so recent changes show up at once. The diagnostics option connects to the mail server, verifies reverse DNS, runs a simple open relay check and measures response time. You can also check each mail server IP against 105 DNS-based blacklists.
Separate pages look up SPF and DMARC records, display them and run validation tests that highlight errors which could affect delivery.
Strengths
- Many email and DNS checks in one place
- MX lookups query the authoritative server directly
- Blacklist check against 105 DNSBLs
- SPF and DMARC validation with error highlighting
Limitations
- Pages carry prompts for the paid service
- Each check runs separately rather than as one combined report
Details
- Pricing
- FreemiumLookups on the site are free to use, with paid plans offered alongside.
- License
- Proprietary
- Developer
- MxToolbox
- Platforms
- Web
- How it runs
- Web application
- Account
- Not required
- Works offline
- No
- Best suited for
- Diagnosing email delivery problems for a domain
- Categories
- Network tools, Website testing
- Last verified
- Added
- Provenance
- Selected from the TechWalrus Resource Hub (Website Checkers & Audit Tools); facts checked against the developer's own pages, 2 sources on file.