protected void checkEnvelopeAddresses(NHINDAddressCollection recipients, NHINDAddress sender) { if (recipients == null || recipients.size() == 0) { throw new AgentException(AgentError.NoRecipients); } if (sender == null) { throw new AgentException(AgentError.NoSender); } recipients.setSource(AddressSource.RcptTo); sender.setSource(AddressSource.MailFrom); }