Delivery priority at low / how it gonna react

Hello

I have a question regarding the Low priority delivery option. How it gonna react if an email must go through 2 Domino servers if both servers have the same low priority period (0:00 to 6:00)?

The mail is create on the first one (by a connected client), it is then transfert to the second one (1352 connection, not smtp) and then release on the internet (smtp)

Thanks for your help