John Doe:
  You have, or someone pretending to be you has attempted
  to log into xxx.com unsuccessfully 3 or more times.  
  To provide you with the utmost in security, xxx.com has
  put your account on a temporary hold.  You may remove
  this hold by logging in as follows.

  The next time you log in (and that time only), use your
  existing user name, plus the text, "+ZRYU3" (without
  the quotes), appended to your username.  Your password
  should be entered in the usual fashion.

  If the unsuccessful login was the result of forgetting
  your password, click THIS LINK to have your registered
  password hint emailed to you at this email address.

  We are sorry for the inconvenience.  If you have any
  questions or need further assistance you may email
  support at login-support@xxx.com.

  Sincerely,
  .....