Bulk mail, often called 'Marketing Mail,' is a cost-effective way to send large quantities of mail. However, the delivery times can be longer than First-Class Mail. Local mailings are typically delivered in three to five business days. National mailings can range from about three to ten business days depending on the distance and other factors such as holidays, mail volume, weather disruptions, and other unexpected events. It's important to remember that, unlike other services, bulk mail does not have a guaranteed delivery window. The aforementioned days are typical or average timelines, but they're not guaranteed.