ok here is something to think about, who of you use and android ? and use the same email for google account with Bitstamp? it could be a Bitcoin related APP.... I need some co-operation here, we need to know from where they've got our emails...
Don't use android.
Someone on reddit got a reply from stamp support:
Dear xXx, Bitstamp has detected an increase in the number of reports of phishing emails which were also received by some of our clients. Our technical team responded by examining the threat and setting immediate security measures in place to prevent potential risks.
As a precaution we have also applied this security measure to your account.
If you have received any emails with suspicious content and have opened links or attachments we highly recommend that you immediately contact a computer expert.
While we appreciate that this comes as an inconvenience we are convinced that our security precautions are in accordance with your expectations in keeping your account secure.
If you consider that your system was not affected we kindly ask you to notify us in a reply to this ticket so we can enable your withdrawals again.
Thank you for your understanding.