Walang confirmation number na ibibigay, i-acknowledge lang ng MPNP na received na yung doc at naipasok na sa file mo. Mostly, sponsor ang nakakatanggap ng reply kasi sila ang nagsend ng email, maybe unless you are cc copied. If I were you bro, hindi ako maghold sa ganyang estado na maghihintay lang dahil oras ang kalaban/kakampi natin.
I would suggest na mag-email kayo sa MPNP asap (advantageous on applicant's side) for confirmation of receipt at i-attach nyo na rin yung SP2 na nai-submit previously. Mas makakampante tayo kung may ebidensya from MPNP itself. Marami na ang narefused ang application due to lack of docs.