SMTP Server Monitoring for Ports 25, 465 and 587
A mail server can respond to ping while its SMTP service is unavailable. TCP port monitoring checks the actual listening port used by mail clients and applications. Smartbooth provides focused Windows and Linux tools with Email, Microsoft Teams, and Telegram notifications.
A practical approach to SMTP monitoring
A mail server can respond to ping while its SMTP service is unavailable. TCP port monitoring checks the actual listening port used by mail clients and applications.
PortAlert tests TCP service availability with configurable timeouts, consecutive-failure logic, optional ping context, recovery alerts, and parallel workers.
The tools use text configuration files, run as a simple background process, and are available for both Windows and Linux. They are intended for organizations that want useful alerts without first building and maintaining a central monitoring platform.
What to monitor
A mail server can respond to ping while its SMTP service is unavailable. TCP port monitoring checks the actual listening port used by mail clients and applications.
Tcp 25
Configure Smartbooth to watch TCP 25 and notify the responsible team when the configured condition continues long enough to require attention.
Smtps 465
Configure Smartbooth to watch SMTPS 465 and notify the responsible team when the configured condition continues long enough to require attention.
Message Submission 587
Configure Smartbooth to watch message submission 587 and notify the responsible team when the configured condition continues long enough to require attention.
Service Recovery
Configure Smartbooth to watch service recovery and notify the responsible team when the configured condition continues long enough to require attention.
Why consecutive checks matter
Networks and workloads are not perfectly steady. One lost packet, one short CPU spike, or one delayed TCP connection should not always wake an administrator. Smartbooth uses configurable consecutive-check counts so an alert can be delayed until the problem persists. After the target returns to normal, the tool sends a recovery notification and resets the alert state.
This low-noise design is especially useful for small teams because it focuses attention on conditions that continue rather than repeating the same message during every monitoring cycle.
| Capability | Smartbooth approach |
|---|---|
| Actual TCP service check | Yes |
| Custom host and port pairs | Yes |
| Parallel workers | Up to 50 |
| Recovery notification | Yes |
Setup workflow
- Download and unzip the Windows or Linux package.
- Add each host, TCP port, description, timeout, and alert count.
- Set the worker count for parallel service checks.
- Test Email, Microsoft Teams, or Telegram, then start one PortAlert process.
Use the product documentation for the exact configuration keys and command-line options. Configuration files use a colon (:) separator rather than an equals sign.
Choose the correct Smartbooth tool
CPUAlert
Monitor CPU and memory HIGH or LOW usage and identify TOP1–TOP5 resource-consuming processes.
View CPUAlert →PingAlert
Monitor host availability and check many servers or devices in parallel using configurable workers.
View PingAlert →PortAlert
Monitor TCP services such as HTTPS, SMTP, databases, remote access, and custom application ports.
View PortAlert →Frequently asked questions
What does a SMTP monitoring check?
It checks the conditions most closely related to SMTP services. The exact checks depend on the selected Smartbooth tool: CPUAlert monitors CPU and memory, PingAlert tests host response, and PortAlert tests TCP service ports.
Does this require a central monitoring server?
No. Smartbooth Alert Tools are portable Windows and Linux utilities designed to run without a separate monitoring server or web dashboard.
Which notification channels are supported?
The tools support Email, Microsoft Teams, and Telegram alerts. Daily IamAlive status is sent by email where supported.
Can it monitor several targets at the same time?
Yes. PortAlert supports worker threads for parallel checks. The default worker count is 2 and the supported safe maximum is 50.
How does Smartbooth reduce alert noise?
Alerts are based on configured consecutive checks. A temporary spike or single failed check does not have to generate an alert, and a separate recovery notification is sent when the condition returns to normal.
Is a trial available?
Yes. Trial mode is available with limits so the configuration and notification flow can be evaluated before purchasing an offline license.