Articles

Known Antivirus issues and workarounds

• Non-Delivery Receipt Email with Error: 'Antivirus check cannot be performed'

  Overview This article describes the error and its resolution, which occurs when you receive a Non-Delivery Receipt (NDR) email with the following error message: <xxxx@testmail.com> (<mail.domain.com>:...

• Fixing Kerio Connect Antivirus Plugin Timeout Issues

  Overview Kerio Connect includes Kerio Antivirus, which provides integrated protection against malicious emails with viruses. At times, you might experience Timeout issues with the Antivirus (AV) plugi...

• Antivirus and License are not updating with Unknown_Error (-3000)

  Overview The Kerio Connect Antivirus module can't be updated with the following Errors: AntivirusModule.cpp: Antivirus Server error(0): Unable to fetch updates: Unknown_Error (-3000) The license updat...

• Antivirus is not updating with Unable to fetch updates: HTTPError (-2106)

  Overview While attempting to update Kerio Connect built-in Antivirus plugin on macOS Catalina, the following server error is returned: AntivirusModule.cpp: Antivirus Server error(0): Unable to fetch u...

• Antivirus Server error: Internet connection is probably broken. Cannot check for new version.

  Overview While updating Kerio Connect Antivirus, the following errors appear in logs: AntivirusModule.cpp: Antivirus Server error(0): Internet connection is probably broken. Cannot check for new versi...

• Unable to start Kerio Connect Antivirus and Anti-spam

  Overview While attempting to start Kerio Connect Antivirus and Anti-spam, the modules are facing issues generating the following errors: AntivirusModule.cpp: Antivirus update failed: Cannot find updat...

• Unable to initialize plugin, error: Failed to close Kerio Antivirus plugin

  Overview While trying to update Kerio Connect Antivirus, the AV plugin is not responding. The server reboot or service stop/start generates the following error: Engine Kerio Antivirus failed to start:...