Category Archives: Tools

Our Commitment to Free Tools

MxToolbox started out as a simple set of free tools for IT and Email administrators. Most of our customers used our original DNS, MX and Blacklist lookups to verify their website and email setup and understand why email wasn’t going through. Since those days, we’ve committed to continually adding useful free tools to help IT and Email professionals with their daily tasks. From A record (and AAAA record) lookups to Whois Lookup, we have you covered (and if there is a tool we’re missing, we encourage you to let us know).

Not only do we have a comprehensive list of tools, we continue to expand it: when we find a tool we need, we add it to the list. For example, we recently added the:

MTA-STS Lookup: This test checks a domain or hostname for an MTA-Strict Transport Security (MTA-STS) DNS TXT record and also for a valid MTA-STS policy.

Organize your MxToolbox Tools

We understand that not all our tools are for everyone, and that you use different groups of tools for different tasks: email, security, setup, etc. For your convenience, we organized our tools into categories:

  • All Tools: Every available free tool is housed under this tab.
  • Email: For email problems, this tab is your best bet
  • Network: To address potential network issues, try these tools.
  • Website: If you have any website queries, this tab provides answers.
  • DNS: You can find all tools related to DNS here.
  • New: This tab shows the most recent additions to our expanding toolbox.
  • My Favorite Tools: Your customized favorites list. For more information, see the corresponding section below. Learn how to setup your favorites

For a complete list of our free tools, click here. We always enjoy questions/feedback, so let us know about your MxToolbox tools experience. Be sure to use our tools to improve your email delivery rates!

Uncover your Email Problems with our Email Delivery Tools

Email delivery is probably the most important connection between Marketing Art and Information Technology. Whether your email is driving sales, connecting to vendors or simply for internal communications, an email that fails to make the Inbox is a failure of communications that can cost your business.

Email Health

A tool that is often overlooked yet is highly beneficial for your email deliverability is our Email Health Report. This tool executes hundreds of domain/email/network setup tests to ensure all of your systems are online and performing optimally. The report returns results for your domain and highlights critical problem areas that need to be resolved.

  • Get full visibility of your email’s health status in one concise report.
  • Identify every problem facing your email, including blacklist, mail server, web server, and DNS issues.
  • Be proactive about email health and detect any current email issues before they cause email failures.

Major MxToolbox Email Delivery Tools

Email delivery is a constantly changing technology landscape. Inbox providers change policies and technologies to protect their users and spammers change methods to get their unwanted messages read. MxToolbox is the Expert in Email Delivery and provides tools to better help you understand your legitimate email delivery issues.

  • Blocklist (IP or Host): The blocklist check tests a mail server’s IP address against over 100 DNS-based email blocklists.
  • DMARC Delivery Report: This tool creates comprehensive DMARC reports, providing insight into potential issues and any needed changes to your DMARC policy.
  • DMARC Report Analyzer: This option makes DMARC Aggregate XML reports human readable by parsing and aggregating them by IP address into helpful reports.
  • Email Bounceback Analyzer: This analyzer returns details regarding the bounce error, such as the inbox provider, why the message bounced, and additional information to help remedy the issue.
  • MTA-STS Lookup: This test checks a domain or hostname for an MTA-Strict Transport Security (MTA-STS) DNS TXT record and also for a valid MTA-STS policy.
  • Spam Analyzer: This tool uses the SpamAssassin software to analyze your message and return a spam score from over 711 various criteria.

Inbox Placement Analysis

Our Inbox Placement tool analyzes your campaign emails before you send them. We determine if the email will make the inbox at major Inbox Providers like Google, Yahoo! and We also analyze important technology and soft factors like:

  • DMARC Compliance
  • Broken or copious links
  • Wordiness
  • Broken or too many images
  • Spammy verbiage
  • Other indicators of spam

Inbox Placement is a feature of all paid Delivery Center plans, so you can test your marketing emails and improve your DMARC compliance all in one place.

Does DMARC and email deliverability seem too complicated?

MxToolbox Experts are here with a Managed Services approach to your email configuration issues.