This article applies as of PRTG 25
Google authentication with PRTG
Previously, you could use your traditional Google Account email (Gmail) and password to configure PRTG authentication settings for email notifications and various sensors. Beginning in 2024, Google ended support for Less Secure Apps (LSA) to increase security and minimize potential risks to your Google Account.
For more information about the changes, see the Google Workspace Update feed.
As a result of these changes, PRTG no longer supports Google authentication with a password. Instead, users now must configure any Gmail credentials with an app password.
What is an app password?
An app password is a 16-digit passcode that you can use in place of your traditional password to grant a third-party access to your Google Account.
You can create new app passwords as necessary. For PRTG, you can reuse the same app password for any sensor or notification setting that you want to authenticate with your Google Account.
For the most up-to-date information on how to create an app password with your Google Account, see the Google Help Center: Sign in with app passwords.
How is PRTG affected?
These changes affect PRTG settings that use IMAP, POP3, and SMTP protocols.
The following sensors are affected:
- IMAP sensor
- POP3 sensor
- SMTP&IMAP Round Trip sensor
- SMTP&POP3 Round Trip sensor
The following notification delivery settings are affected:
How to configure PRTG
If you want to use your Google Account for authentication, you must use the app password in the relevant Password setting.
| Sensor or notification delivery | Setting location | How to configure |
|---|---|---|
| IMAP sensor | Sensor settings under Authentication | Enter your Gmail address as the User name. Enter the app password as the Password. |
| POP3 sensor | Sensor settings under Authentication | Select User name and password as the POP3 Authentication Method. Enter your Gmail address as the User name. Enter the app password as the Password. |
| SMTP&IMAP Round Trip sensor | Sensor settings under Step 1: Send Email Using Parent Device (SMTP Server) Step 2: Check an IMAP Mailbox until Email Arrives | Enter your Gmail address as the User name. Enter the app password as the Password. |
| SMTP&POP3 Round Trip sensor | Sensor settings under Step 1: Send Email Using Parent Device (SMTP Server) Step 2: Check a POP3 Mailbox until Email Arrives | Enter your Gmail address as the User name. Enter the app password as the Password. |
| Notification Delivery | SMTP Delivery | Use either one SMTP relay server or two SMTP relay servers. Select Use standard SMTP authentication as the SMTP Relay Authentication. Enter your Gmail address as the SMTP Relay User name. Enter the app password as the SMTP Relay Password. |
