“When you next try to login to the forums, your old password will not work,” reads the mail. “Click the ‘I’ve forgotten my password link’ underneath the login boxes, and follow the steps to setup a new password for your account.
“We recommend you do not use your old password or a password you have used for other sites. Further, if your old forum password was used for any other online purposes, we recommend changing the password on those accounts as well.”