/**
* Returns true if the domain component of an email address is valid.
*
* @param domain being validated, may be in IDN format
* @return true if the email address's domain is valid.
*/
protected boolean isValidDomain(String domain) {
// see if domain is an IP address in brackets
Matcher ipDomainMatcher = IP_DOMAIN_PATTERN.matcher(domain);
if (ipDomainMatcher.matches()) {
InetAddressValidator inetAddressValidator = InetAddressValidator.getInstance();
return inetAddressValidator.isValid(ipDomainMatcher.group(1));
}
// Domain is symbolic name
DomainValidator domainValidator = DomainValidator.getInstance(allowLocal);
return domainValidator.isValid(domain) || domainValidator.isValidTld(domain);
}
