<p>The following USPS shipping services are no longer supported:<ul><li>USPS First-Class Mail International Large Envelope</li><li>USPS First-Class Mail International Letter/Postcard</li></ul>All your shipping methods that used these services have been changed to use <b>USPS First-Class Package International Service</b> instead. Please go to <b>Administration → Shipping & taxes → Shipping methods</b> and check the settings of your shipping methods that use USPS.</p>