How to Use the Letter API to Automate the Newsletter API

 The letter API can help automate the mailing process, using trusted printers near the recipient. This service can also automate letter folding, inserting, stuffing, and sorting. In this article, we'll explain how you can use the API to automate the letter mailing process. But before you get started, you should know what's required. Before you start building your app, consider the letter API's cost and benefits. It may surprise you that the service costs a fraction of the cost of traditional mailing.

To get started, you'll need to map the recipient addresses to Lob's inline address object. You can also import recipient addresses from a CSV file. The Letter API can create sample billing letters that reflect your brand guidelines. And it supports address verification for US and international locations. This means you can have consistent branding across all of your marketing channels. The API's free version includes a sample letter. To learn more, download the free brochure.

The "Donut" in the API identifies motor oils that meet current API engine oil standards. It contains the motor oil's SAE viscosity grade, the API standards it meets, and other important performance parameters. API "S" followed by a letter denotes an oil that is suitable for gasoline engines. API "C" or "D" denotes a motor oil suitable for diesel engines. Its shape is also a good indicator of whether it's suitable for diesel engines.