Hello Paul,
Mark did say in his earlier post that there will be downtime.
" . . . old server is hosted in rack which cannot fulfill power requirements of the Dell poweredge 1950 servers. We have decided to forward A records and MX records of all domains on puma to the new server.
Customers not hosting their DNS on puma will need to change A records and mx records of their domains to make them point to the new server. Their
website hostings will continue to work from the old server till they point A records to new server."
The server came up and all sites have been functioning correctly thereafter. At this instance, the server's firewall was being tweaked because of which the sites are inacessible. All the
website hostings would be online in the next few minutes.