Which of the following is true about postage meters?

Postage meters are devices that print postage directly onto envelopes or labels, and one of their most significant advantages is their ability to automatically calculate postage fees. This automation simplifies the shipping process for businesses by ensuring that they apply the correct amount of postage according to the weight, size, and destination of the mail piece.

Utilizing postage meters saves time and reduces the chances of underpayment or overpayment of postage, making them particularly valuable for regular mailing operations. The technology behind postage meters has evolved to accommodate various shipping options and rates, which further enhances their efficiency and accuracy.

The other choices do not represent the functionalities or applications of postage meters accurately. For instance, while they are primarily used in commercial settings, they can also be utilized by individuals for personal mailings. They are still widely accepted in mailing operations today and are not limited to just international shipments; they can be used for domestic mail as well.