Last night a flood of emails were sent from firstname.lastname@example.org to some Mint users. It was a misconfiguration with our email provider causing blank emails to go out. This was not a security breach and no data was compromised.
In the course of testing something on our staging server, the wrong box was checked in our email configuration, causing blank emails to be sent to some of our users. There’s no security issue here, just a bad email configuration. We’ll post an update on the Mint.com homepage soon to let users know what went wrong, and are putting measures in place to ensure this never happens again.