English: Message Stream ID is <strong>optional</strong>. By default <strong>outbound</strong> (Default Transactional Stream) will be used. More information can be found in our %1$sPostmark documentation%2$s.
Dutch: Bericht stream ID is <strong>optioneel</strong>. Standaard wordt <strong>uitgaande</strong> (standaard transactionele stream) gebruikt. Meer informatie is te vinden in onze %1$sPostmark documentatie%2$s.