app.ERROR: Exception occurred while flushing email queue: Connection could not be established with host

[OtezVikentiy]

Hello, could you please provide some help?

I've got a project on SF4. KVM virtual server and docker. I use this docker image. When i connect to container and run postfix check - everything is ok, but from the project it does not want to send email with error

app.ERROR: Exception occurred while flushing email queue: Connection could not be established with host smtp.******.ru