array(3) {
  ["emailAddressInvalidHostname"] => string(32) ""Email" is not a valid hostname."
  ["hostnameUnknownTld"] => string(80) "'gmail.xxx' appears to be a DNS hostname but cannot match TLD against known list"
  ["hostnameLocalNameNotAllowed"] => string(86) "'gmail.xxx' appears to be a local network name but local network names are not allowed"
}