Email DNS Blacklist Monitoring Software Tool
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Email DNS Blacklist Monitor

Email DNS Blacklist Monitoring Software Tool for IT Professionals

a sub-component of Internet Server Monitor

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Amazing! (Corner Bowl) Always picks up the phone when help is needed. Server Manager is both a feature and budget friendly application based by a customer-focused support structure. I am able to add monitoring functionality in minutes -- not hours -- and you can literally have the product installed and working in less than 1 hour.
Michael Thomason
Technology Architect
Emory Healthcare
July 30, 2020

Monitor Any Email Blacklist Also Known as DNS Blacklist or DNSBL and Get Notified Immediately!

Why use DNS Blacklists?

"The rise of spam and other anti-social behavior on the Internet has led to the creation of shared blacklists and whitelists of IP addresses or domains. The DNS has become the de-facto standard method of distributing these blacklists and whitelists."

How do DNS Blacklists Work?

"A Domain Name System-based Blackhole List, Domain Name System Blacklist (DNSBL) or Real-time Blackhole List (RBL) is a service where with a simple DNS query mail servers can check whether a sending IP address is on a blacklist of IP addresses reputed to send email spam. Most mail server software can be configured to check one or more of such lists - typically rejecting or flagging messages if it is from a listed site."

Source:  Wikipedia

How does Corner Bowl Email Blacklist Monitor do it?

Email Blacklist Monitoring is available as a sub-component of both Corner Bowl Event Log Manager 2021 and Corner Bowl Server Manage 2018. When you purchase either an Internet Server Monitor license or a Server Manager license simply register your license in either our latest monitoring software, Event Log Manager or our tried and true Server Manager software.

Once registered, Corner Bowl Software enables you to schedule Email Blacklist monitoring. DNS Blacklists are scanned for the existence of results such as indicating the email server is blacklisted. If an email server is blacklisted, Corner Bowl Software sends regular email notifications to the responsible IT administrators until the email server is no longer blacklisted.

  • Runs on a Windows Server or Workstation as a Windows Service.
  • Includes 30+ pre-configured email blacklists
  • Scans Email Blacklists at the frequency you define.
  • Receive email and SMS notifications as soon as your email server is blacklisted.
  • Once your email server is blacklisted, Corner Bowl includes the option to ramp up the scanning frequency so you are notified the instant your email server is no longer blacklisted.
  • Includes historical and email blacklist statistics over time.

How to Monitor Email Blacklists with Server Manager 2018

Corner Bowl Email Blacklist Monitor Screenshots

Corner Bowl System Component and Network Architecture

Available Notifications, Alerts and Actions

Send Emails
Send custom email alerts and notifications with optional log file attachment support.
Send Microsoft Teams Messages
Send alerts and notifications to Microsoft Teams Channels via Incoming Webhook Connector.
Send SMS Messages
Send text messages through various popular SMS providers such as Twilio.
Launch a Script
Remote launch your own custom Powershell scripts, batch files and executables.
Manage Windows Services
Remote stop, start and restart Windows Services.
Fire SNMP Traps
Need to integrate into your enterprise systems? Fire Simple Network Management Protocol (SNMP) traps when critical events are detected.
Write to File
Write, append and backup schedule reports to HTML, CSV, TXT and PDF file formats.
Write Event Log Entries
Write custom alert and notification messages to any Windows Event Log on any machine.
Send Syslog Messages
Send custom Syslog alerts and notifications. You can even relay Syslog messages to another server.
Display Desktop Notifications
Client/Server architecture enables you to receive real-time notifications on your personal desktop or laptop.

System Requirements

Supported Operating Systems
  • Windows Server 2019, 2016, 2012, 2008 R2
  • Windows 10, 8, 7 SP1
Supported Architecture - 64-Bit and 32-Bit

Internet Server Monitor can be installed on both 64-bit and 32-Bit Windows.


8 GBs of available memory, 16 GBs suggested when monitoring 100s of endpoints.

Microsoft .NET Framework 4.8

The installation detects if the .Net Framework 4.8 is already installed. If not, the framework is automatically downloaded from Microsoft and then installed. Please note the framework may take a significant amount of time to install. Please be patient while the installation completes.

Domain Administrator Account

To access and manage remote resources Log Manager requires domain administrator credentials. If off-domain, then local administrator credentials. The first time the application is run, the onboarding wizard will prompt you to assign then necessary credentials to the service.

Windows Management Instrumentation (client and server)

Many functions within Corner Bowl Software utilize Microsoft's Windows Management Instrumentation (WMI) API (e.g. Event Log management, CPU and memory monitoring). This software includes options to optimize WMI packet size and performance.


Internet Server Monitor (ISM) is a sub-component of both our software packages, Corner Bowl Server Manager and Corner Bowl Event Log Manager. To access ISM functionality either install Corner Bowl Server Manager or Corner Bowl Event Log Manager then apply either a purchased Server Manager or ISM license.

Corner Bowl Software is sold in node packs. Each unique IP address or hostname that is monitored, scanned or managed by the software is a node.

Corner Bowl Software can be installed on a single host or up to as many hosts as nodes purchased.

For example, a 100 node license would enable an IT professional to install the software on 3 servers with one installation monitoring 50 servers and the other two installations monitoring 25 workstations each for a total of 100 nodes.

After you purchase a license, you have the option through this website or your reseller to upgrade your existing license with more nodes.

Once you have purchased a license, a license key will be emailed to you. If you purchase through a reseller, a claim link will be emailed to you enabling you to retrieve your key from this website. Once you have your key you will register online through the software's management console. If you are installing this software on an Air-Gapped network, you will generate license key files through this website where you will also find detailed instructions on how to apply your Air-Gapped key files.

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Last Updated: June 1st, 2021