It's very easy to use, it has been tested for many years by our Anti Spam team - they have found no problems at all! They recommended us some features we didn't even know about (such as automatic deletion of messages in spam folder) which are really helpful once you get used them. There also doesn´t seem any issues when working from home using VPN connection so far but please keep this option open if needed during remote work sessions too!! Nothing specific though I think everything fits quite well since there aren't just one feature missing here ;) We're running Mailbox servers connected through mail services like Gmail/G Suite etc., where users store their emails within these systems itself without having direct access via MxSave account; hence mailbox server stores only those mails marked "delivered".