How validate a 'MX record' with #groovy (http://en.wikipedia.org/wiki/MX_record)

MailExchange.groovy

package you.mane

import javax.naming.directory.InitialDirContext
class Clazz {
  static mailExchange(String email) {
        def emailParts = email.split('@')
        if (emailParts.size() == 2) {
            try {
                def domainName = emailParts[1]
                def iniDir = new InitialDirContext();
                def idAtrr = new String[1]
                idAtrr[0] = 'MX'
                def mxs = iniDir.getAttributes("dns:/${domainName}", idAtrr);
                return mxs.size() > 0
            } catch (e) {
                //...show error
            }
        }

        return false
    }
}