FireEye's Employee Email Address Formats

FireEye uses 5 email formats, with first '.' last (ex. john.smith@fireeye.com)
being used 88% of the time.
first_initial lastjsmith@fireeye.com1%
first lastjohnsmith@fireeye.com2%
first '.' lastjohn.smith@fireeye.com88%
other_templateother_template@fireeye.com8%
firstjohn@fireeye.com1%