# MxToolbox

> MxToolbox is the leading provider of email deliverability, DNS, and network diagnostic tools. Our SuperTool runs hundreds of free lookups (MX, SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT, blacklist, and more) to help engineers and email administrators monitor and troubleshoot their domains.

## Docs

- [About MxToolbox](https://mxtoolbox.com/Public/Content/AboutUs.aspx): Company overview and mission.
- [Privacy Policy](https://mxtoolbox.com/Public/Content/PrivacyPolicy.aspx): How we handle user data.
- [Terms of Service](https://mxtoolbox.com/Public/Content/TermsAndConditions.aspx): Legal terms governing use of our tools and services.
- [Security Statement](https://mxtoolbox.com/Public/Content/SecurityStatement.aspx): Our security commitments and practices.
- [API Reference](https://mxtoolbox.com/api/api-reference): REST API documentation for programmatic access to MxToolbox lookups.

## Tools

- [SuperTool](https://mxtoolbox.com/SuperTool.aspx): Run any of our 30+ lookups against a domain or IP from a single page.
- [Domain Health](https://mxtoolbox.com/DomainHealth.aspx): All-in-one report covering DNS, mail server, web server, and blacklist status.
- [MX Lookup](https://mxtoolbox.com/MXLookup.aspx): Display the MX records for a domain.
- [Blacklist Check](https://mxtoolbox.com/blacklists.aspx): Check whether a domain or IP is on 100+ DNS blacklists.
- [SPF Lookup](https://mxtoolbox.com/spf.aspx): Validate a domain's SPF record.
- [DKIM Lookup](https://mxtoolbox.com/dkim.aspx): Validate a domain's DKIM selector record.
- [DMARC Lookup](https://mxtoolbox.com/dmarc.aspx): Validate a domain's DMARC policy record.
- [BIMI Lookup](https://mxtoolbox.com/bimi.aspx): Validate a domain's BIMI record and logo.
- [MTA-STS Lookup](https://mxtoolbox.com/mta-sts.aspx): Validate a domain's MTA-STS configuration.
- [TLS-RPT Lookup](https://mxtoolbox.com/tlsrpt.aspx): Validate a domain's SMTP TLS Reporting record.
- [LLMs.txt Lookup](https://mxtoolbox.com/llmstxt.aspx): Validate a domain's /llms.txt file for AI agent discoverability.
- [Email Header Analyzer](https://mxtoolbox.com/EmailHeaders.aspx): Parse and analyze raw email headers.

## API

- [API Overview](https://mxtoolbox.com/api/api-reference): Authenticated REST endpoints for SuperTool lookups, monitoring, and reporting.

## Optional

- [Products](https://mxtoolbox.com/Public/Content/Products.aspx): Paid monitoring and deliverability products.
- [RFC Index](https://mxtoolbox.com/rfc/): Browse internet RFCs referenced by our tools.