I do not think Twilight would like sitting on pillow and reading other letters, after all she prefer to be the one writing it and leading squad during the crisis, not make others do it for her.
Twilight: A message to me, I wonder what it is ?
Dear Sugar-cube Princess Twilight
That old bug Chrysalis is heading to Ponyvile and her minions already infiltrate Ponyvile, I and the rest of your friends are now in your library as Spike send you this message, we really would use your help here.
You faithful friend farm pony, AJ.
Twilight: Chrysalis is back, hmn....., my brother and princess Cadance are now in Crystal Empire, Luna probably sleep and Celestia is busy as always, what to do, what to do, oh well, lets do it old fashioned way, GUARD !
Guard: Yes you Highness ?
Twilight: Please inform Princess Celestia and Capitan of the Royal Guards that Chrysalis is on her way to Ponyvile and her chagelings infiltrate Ponyvile, tell them they should set up Canterlot on high alert and organize some reinforcements to assist in Ponyvile, also tell princess Celestia that I am heading to Ponyvile with elements of harmony.
Guard: But your highness, you should not risk ......
And before guard could finish his sentence, Twilight was gone in a flash.
Guard: Long range teleportation again, I will never get use to our new princess, she never bother to be formal or to sit in one place.