We'll be taking the MailBuild application offline for a total of 4 hours this Sunday morning between 1am and 5am (US Central time - see this in your own time zone) to make some key hardware upgrades and add some additional layers of redundancy to both MailBuild and Campaign Monitor.

Don't worry, the maintenance will have zero impact on your client's subscribe forms or campaign tracking, everything will purr along as usual - they just won't be able to log into their account. If your clients schedule any campaigns to be delivered in this time-frame, they'll be sent as soon as the application is back online.

Update: We got the updates done faster than expected and as of 2.40am we're back online. Thanks for your patience (that is of course if you weren't sound asleep).