Users are getting a Non-Delivery Receipt (NDR) email with the following error message:
<firstname.lastname@example.org> (<mail.domain.com>: Antivirus check cannot be performed)
NDR emails may be received when sending a message to an invalid email address.
This article guides you with a solution to this particular error.
The error indicates an issue with the mail domain during an Antivirus check.
The issue can be resolved by removing the Bitdefender folder:
- Stop Kerio Connect service under Services before performing any actions.
- Locate the Bitdefender folder and delete it.
- Start Kerio Connect service.