New Question
PRTG Network Monitor

Intuitive to Use.
Easy to manage.

300.000 administrators have chosen PRTG to monitor their network. Find out how you can reduce cost, increase QoS and ease planning, as well.

Download >>


What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

Learn more


Top Tags

View all Tags

Notifications Stopped Working



Your Vote:



We were chugging along just fine and two weekends ago our notifications just stopped working. We are receiving an alert in the lower right corner indicating that something was wrong with notifications.

We have been inside and outside the config and we're as certain as we can be that there weren't any changes.

We discovered our server was slightly out of date so we updated it to the latest version (v17.1.30.1618.)

Is anyone else having similar problems? Where does the notification module log its error messages?

many thanks in advance.

configure-email-credentials email-notifications mail-notifications

Created on Mar 30, 2017 7:05:51 PM by  pca_it_admin (0) 1

1 Reply



Your Vote:



Hello there,
thank you for your KB-Post.

You can check for failed notifications using the "Notification Delivery Log", available under Logs > System Events > Notifications, this will allow you to identify any failed notifications.

You can also send a Test notification from within Setup > Notifications using the Test button. Send a test notification and if it doesn't arrive on the client, check the notification log.

If you're having issues with the E-mail delivery, please make sure that you're using the Use SMTP relay server (recommended inside LANs/NATs) option (and NOT Direct delivery using built-in email server (default)). The later can stop working when your DNS changes or mail server configuration changes.

And for extensive troubleshooting, please review this Post to enable the detailed debuglog:

Best Regards,
Luciano Lingnau [Paessler Support]

Created on Apr 3, 2017 11:41:08 AM by  Luciano Lingnau [Paessler Support]

Please log in or register to enter your reply.

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.