So we are thinking of using your service but we need to understand how scaling an costs would work.
A the moment we host our own mail server for our clients which has around 250 domains with 800 mailboxes and uses circa 350GB disk space. Also we are adding new domains every week so this is growing.
Although we are not planning to migrate all of these immediately it is our plan to eventually do so, so we need a scalable solution. What kind of plan could you offer us and how would this be priced?