Job "object properties collection", which is run daily by Veeam One Reporter, always ends with a warning. After entering the session statistics I found the message "[warning]: Can not notify by e-mail. Check logs for details".
Notification settings in the configuration of the Veeam One Monitor service are correct, the test mail passes correctly, and I receive any other e-mail notifications. Only this task can not send a notification. I am asking for a hint, where to look for the cause.