Legacy OS supports scheduled messages across channels you enable. Email is natural for reach; postal delivery covers cases where a physical letter is the right medium.
Maintenance pricing describes what the service includes at a high level — for example, postage for eligible physical mail within fair-use limits. Exact rules live in terms and in-product copy; always read what ships with your plan.
When in doubt, test digitally first
Confirm recipients and timing on a path you control before committing irreplaceable paper to the mail stream.