The USPS first class mail option is the fastest option but it comes at a more expensive rate. First class postage can be used for personal or business mail. The delivery time is around 1-3 days locally and 3-5 days nationally. The size and weight of the piece decide the cost of first class postage. Standard mail is typically known as “marketing mail” because it is primarily used for advertising and marketing. You can send anything that is not confidential via standard mail. Standard mail takes between 2-5 days to be delivered locally and up to 1-4 weeks nationally.
Non-profit mail is also referred to as “bulk mail”. Non-profit organizations can receive postal discounts. This mail is treated the same as standard mail. The status of a non-profit alone does not necessarily make someone eligible for postal discounts. Always check with the eligibility guidelines on the USPS website.