function mail(recipient) {
  if (recipient == 'quickbrownfox') {
  	user = 'info'
  	domain = 'quickbrownfox'
  	tld = 'dk'
  } else if (recipient == 'christian') {
    user = 'christian'
    domain = 'doeleman'
    tld = 'dk'
  } else if (recipient == 'maria') {
    user = 'maria'
    domain = 'quickbrownfox'
    tld = 'dk'
  } else {
    return false
  }
  return user+'@'+domain+'.'+tld
}