code: public static boolean is_email(String email, boolean checkDNS)
  			throws DNSLookupException {
  		return (is_email_verbose(email, checkDNS).getState() == GeneralState.OK);
  	}
docs: Checks the syntax of an email address.
  
  @param email
  The email address to be checked.
  @param checkDNS
  Whether a DNS check should be performed or not.
  @return True if the email address is valid.
  @throws DNSLookupException
  Is thrown if an internal error in the DNS lookup appeared.