MXToolbox is a comprehensive online tool designed to help users test and troubleshoot their email systems, DNS configurations, and network performance. It offers a variety of diagnostic tools and services, including:
- MX Lookup: This tool lists the MX (Mail Exchange) records for a domain, helping to diagnose email delivery issues by verifying the priority and correctness of the mail servers listed for a domain.
- Blacklist Check: Tests a mail server IP address against over 100 DNS-based email blacklists to determine if it has been blacklisted, which can affect email deliverability.
- Domain Health Check: Performs a series of tests on a domain to ensure all systems (email servers, DNS, web servers) are operating correctly and identifies any issues that need to be resolved.
- SMTP Diagnostics: Connects to a mail server via SMTP to perform an Open Relay Test, verify reverse DNS records, and measure response times, ensuring the mail server is configured correctly and not vulnerable to spam relaying.
- SuperTool: An integrated tool that combines MX record, DNS, blacklist, and SMTP diagnostics in one place, providing a comprehensive overview of a domain's health and performance.
MXToolbox also includes tools for checking SPF records, performing reverse IP lookups, analyzing email headers, and monitoring web server SSL certificates. These tools are essential for maintaining the health and security of email and DNS systems
