SMTP Monitoring

Email is how your business communicates. A little email outage can cost you, reducing productivity, and impacting customer service and losing sales. You need to be aware of issues that might turn into outages. You need monitoring.

Start monitoring today.

Monitor your email Uptime!

MxToolBox SMTP Monitoring alerts you to issues that affect your email. From RFC compliance to measuring your email server's responsiveness, MxToolbox SMTP monitoring provides your business with peace of mind. Featuring immediate outage alerts and graphs of response time, our monitoring is there to protect your business.

One industry estimate states that 72% of Small-Medium Businesses will experience an email outage lasting at least 4 hours every year. Can you afford to miss an outage?





Check your Configuration!

MxToolbox SMTP monitoring is more than just up or down. We check your SMTP configuration for RFC compliance, best practices and more. While you may be up, we can tell you if your email server is running right.

MxToolbox SMTP Monitors run several tests on your email servers:

  • Connection Time
  • Transaction Time
  • TLS Support
  • Reverse DNS resolution
  • Reverse DNS match
  • Open Relays

Get Started Today!

Mailflow Monitoring - an end-to-end Mail Performance Monitor

For those serious about mail server performance, MxToolbox has you covered. Our Premium Mailflow Monitoring gives you complete insight into the performance of your email servers. This additional monitor sends an email to your server every 5 minutes and analyzes end-to-end server performance. With Mailflow you see inside your servers. Learn More

MxToolBox Professional Interface

All monitoring products come with access to MxToolBox Professional, our new more powerful interface that combines lookups and monitors.

Other Professional Monitoring Services

Blacklist Monitoring

Email blacklists are a common way of reducing spam, but occasionally legitimate businesses end up on blacklists. The blacklist monitor will regularly check a mail server IP address or domain against over 100 DNS based email blacklists and alert you. Most MxToolBox Professional packages include a number of standard monitors that can be used for blacklist monitoring. Learn More

Mailflow Monitoring

Even short email delays can be costly for your business. Our MailFlow Monitor provides end-to-end, round-trip email server testing to detect issues before they become problems for your users. We confirm mail can be sent and received from your email server and alert you to any delays we detect.

You can purchase MailFlow monitoring packages in addition to your MxToolBox Professional subscription. Learn More

Domain Health

Our Domain Health Monitor is an all-in-one monitor for your entire domain’s well-being. Monitor your entire domain, including web server configuration and status, dns records and configuration, smtp email server configuration and status, plus blacklists.

You can purchase Domain Health monitoring packages in addition to your MxToolBox Professional subscription. Learn More

API Access

Our RESTful API enables integration of our lookups and monitoring services with custom applications and databases. Leverage our technology to enhance your system administration applications. Learn More

MxToolBoxProfessional Features

  • Early Access to New Tools
  • NO Third Pary Ads
  • Recent Lookup History
  • My Favorites
  • Quick Watch Monitors
  • DNS Record Traversal
  • Batch Lookups
  • Killer "Tools"
Start SMTP Monitoring