Consigned

The letter was consigned to the wastepaper basket.

Here, your sentence is now consigned to posterity!

This Polydorus Priam from the war / to Thracia's King in secret had consigned / with store of gold, when, girt with siege, he saw / Troy's towers, and trust in Dardan arms resigned.

It will soon be consigned to history.

These letters might readily have been consigned to the depths of the wastebasket unopened, unread.