Subject: Apologies for the downtime, but we're coming back stronger.
As you may already know, BrowserStack experienced an attack on 9th November, 2014 at 23:30 GMT during which an individual was able to gain unauthorized access to some of our users’ registered email addresses. He then tried to send an email to all our registered users, but he was only able to reach less than 1% (our estimate is 5,000 users). The email contained inaccurate information, even claiming that BrowserStack would be shutting down.
When we realized this, our only concern was to protect our users. This involved temporarily taking down the service, as we scrutinized each component carefully. This inconvenienced our users for several hours, and for that we are truly sorry.