You can reset your password using the following link:
https://www.bitmex.com/resetPassword


You will be sent a password reset confirmation email. 

If you click on the link on the email too late, you will receive a 404 error because the link will have expired.


If you receive a 404 error when clicking on the link in the confirmation email, you will need to visit 

https://www.bitmex.com/resetPassword again to restart the process.