Paessler PRTG

Reliable email services & healthy mail servers: Monitor your email systems with PRTG

  • Check the availability and response time of your mail servers
  • Monitor network performance and email delivery processes
  • Check the contents of emails sent by backup software and other applications
  • Easy setup with preconfigured sensors for POP3, IMAP, and SMTP

Our users give top ratings for monitoring with Paessler PRTG



PRTG makes monitoring emails & mail servers easy

Custom alerts and data visualization make it easy to monitor, identify, and prevent email delivery and server issues.






4 reasons to choose PRTG as your email monitoring tool

All-in-one monitoring

With Paessler PRTG, all monitoring features, alerts & notifications, and reports are included. No matter if you’re looking to set up a small monitoring system for your mail server and email delivery, or complex monitoring for your entire network (hardware, virtual environments, applications, and more), PRTG has got you covered.

Quick and easy setup

PRTG comes with several preconfigured sensor types for your email and mail server monitoring, including POP3, IMAP, and SMTP sensors, so setting up your email monitoring is quick and easy. Plus, our Auto-Discovery feature automatically scans your network and helps you get started with monitoring in just a few minutes.

Customizable alarms

You can customize PRTG’s alerting system according to your own individual needs to receive alerts by email, push notification, SMS, and other methods. Specify when PRTG should sound the alarm by defining thresholds, notification triggers, and escalation steps – so you’ll only receive messages when it’s necessary.

Comprehensive overview

Pinpointing the cause of errors with your email delivery and other processes can be difficult. PRTG makes it easier with a comprehensive view of your databases, servers, LAN, bandwidth, network traffic, and many other aspects that can influence email services. Save time getting to the root of problems and fix errors faster with PRTG.










What email monitoring looks like in PRTG

Diagnose network issues by continuously monitoring your mail servers and end-to-end email delivery. Show response time, round trip time, and key health stats in real time and visualize data in graphic maps & dashboards to identify problems more easily. Gain the visibility you need to troubleshoot problems with your mailing systems.


Start email & mail server monitoring with PRTG and see how it can make your network more reliable and your job easier.



IT experts agree: Paessler PRTG is a great solution for IT infrastructure monitoring


“All-around winning
network monitor”

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“The real beauty of PRTG is the endless possibilities it offers”


“PRTG Network Monitor
is very hard to beat”


Use case: Checking the content of backup emails

Use PRTG’s email monitoring capabilities to constantly check the status of your backups and other processes.

As most backup software, for example Veeam, sends emails to indicate whether or not a backup was successful, and many other applications send important messages by email as well, monitoring the content of these emails is the easiest way to keep an eye on such processes.

If an email notifies you of a serious issue, you can configure PRTG in a way that it immediately alerts you via SMS or push notification – no more sifting through a pile of emails on the next workday when it may already be too late.



















Email monitoring & mail server sensors included with PRTG



The IMAP sensor monitors the response time of a mail server and the number of emails in the defined mailbox. The sensor also comes with special filters and assigns statuses based on words or phrases found in emails. For example, PRTG can scan the subject or body of an email for keywords defined by you.


The POP3 sensor monitors the response time of a mail server via POP3.


The SMTP sensor monitors the response time of a mail server via SMTP.

SMTP & IMAP Round Trip

The SMTP&IMAP Round Trip sensor uses SMTP and IMAP to monitor the end-to-end delivery of your email, more specifically, the time it takes for an email to reach an IMAP mailbox.

SMTP & POP3 Round Trip

The SMTP&POP3 Round Trip sensor uses SMTP and POP3 to monitor the end-to-end delivery of your email, more specifically, the time it takes for an email to reach a POP3 mailbox.

Also check out our other preconfigured mail server sensors, for example, for Microsoft Exchange.


3 benefits of monitoring email and mail servers with PRTG

Improved productivity


No more having to constantly check your inbox, plus get fewer complaints for your customer service department.

Faster troubleshooting

In the event of a glitch, you’ll be notified at once. This means fewer emergency operations so your coworkers can focus on their work.

Peace of mind

If PRTG is quiet, then everything is OK. Your coworkers should notice the improvements immediately.


PRTG is compatible with all major vendors, products, and systems

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Your email monitor at a glance – even on the go

Set up PRTG in minutes and use it on almost any mobile device.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.



PRTG monitors these vendors and applications in one view!


vendors vm ware



Easily find the source of the problem with our PRTG email monitoring solution

Real-time alerts and custom notifications make it easy to solve issues with the end-to-end delivery of emails.



Create innovative solutions with Paessler’s partners

Partnering with innovative vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


baramundi and PRTG create a secure, reliable and powerful IT infrastructure where you have everything under control - from the traffic in your firewall to the configuration of your clients.

Read more

IP Fabric

Combining the broad monitoring feature set of PRTG with IP Fabric’s automated network assurance creates a new level of network visibility and reliability.

Read more


Combine PRTG's monitoring of everything with SQmediator’s deep insights into your communications infrastructure to ensure and improve your company’s communications plant and troubleshooting abilities.

Read more



“Excellent tool for detailed monitoring. Alarms and notifications work greatly. Equipment addition is straight forward and server initial setup is very easy. ...feel safe to purchase it if you intend to monitor a large networking landscape.”

Infrastructure and Operations Engineer in the Communications Industry, firm size 10B - 30B USD

Read the entire review at Gartner Peer Insights 


PRTG makes monitoring emails & mail servers easy

Custom alerts and data visualization make it easy to monitor, identify, and prevent hardware, application, and service issues.



Monitoring emails: FAQ


What is email monitoring?

Email monitoring involves the systematic tracking and analysis of email communications within an organization. It typically includes scanning email content, attachments, and metadata for various purposes such as security, compliance, and performance evaluation.

What is mail server monitoring?

Mail server monitoring is the process of continuously observing the performance, availability, and security of a mail server infrastructure. This includes tracking server uptime, response times, mail delivery rates, and disk space usage.

Email and mail server monitoring tools often generate alerts for potential issues such as server downtime or high email queue lengths, help ensure smooth email operations, minimize downtime, and enhance overall email service reliability and security.

Why should I use email monitoring software?

Email monitoring software offers several benefits for organizations, including:

  • It helps detect and prevent security threats such as phishing attacks, malware distribution, and unauthorized access to sensitive information.
  • By analyzing email usage patterns and identifying inefficiencies, it can optimize email workflows.
  • It tracks email server performance metrics, making sure that emails are delivered correctly and in time.

How does PRTG ensure emails are delivered?

To make sure that emails are delivered correctly, PRTG comes with preconfigured email round trip sensors. These sensors check the following process:

  • Step 1: PRTG delivers an email to the mail server (or an email client) via SMTP.
  • Step 2: The SMTP server delivers the email to a POP3 server (which can be at another location, in the LAN, or on the same server).
  • Step 3: PRTG checks for emails from the POP3 server every second until the test email arrives.

How do I use PRTG email monitoring for applications and backups?

  • Step 1: In PRTG, add the IMAP sensor to the device that represents your mail server. Make sure the application to be monitored is able to send status emails to the corresponding email address.
  • Step 2: Specify the conditions for which you would like to be alerted, for example, if you have not received an email for 24 hours from your backup software, or if certain words such as “error” appear in an email.
  • Step 3: Test your configuration by sending yourself an email with the words that you specified in your filter rules.

How will I be notified if my mail server is down?

PRTG offers multiple methods to send out alerts, including SMS, Teams and Slack message, or in-app push notification. This ensures that users can be informed in multiple ways, even if there is an issue with the mail server itself and email delivery is not possible.

What is a sensor in PRTG?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, for example the traffic of a switch port, the CPU load of a server, or the free space on a disk drive.

On average, you need about 5-10 sensors per device or one sensor per switch port.


PRTG the multi-tool

PRTG: The multi-tool for sysadmins

Adapt PRTG individually and dynamically to your needs and rely on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects via HTTP requests
  • Custom sensors: Create your own PRTG sensors for customized monitoring
  • Custom notifications: Create your own notifications and send action triggers to external systems
  • REST Custom sensor: Monitor almost everything that provides data in XML or JSON format


More than just a monitoring tool:
Reasons our customers love PRTG



Still not convinced?


More than 500,000
sysadmins love PRTG

Paessler PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.


Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.


Try Paessler PRTG
for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free.



Paessler PRTG 

Start email & mail server monitoring with PRTG and see how it can make your network more reliable and your job easier.



Network Monitoring Software - Version (June 13th, 2024)


Download for Windows and cloud-based version PRTG Hosted Monitor available


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Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications

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