The standard envelope weight is the same as a First-Class Mail envelope! But what is the weight you should use for mailing your letters?| PostGrid
First-class international postage rates and standard class international postage rates are different as the former is faster than the latter| PostGrid
US postal services have a load of international mailing services for USPS shipping to Canada and other countries. Read more.| PostGrid
Address is the most important thing that you need to provide when sending an envelope. Tools ensure your post reaches the recipient.| PostGrid
Senders use NCOALink and CASS from USPS to combat mail returns beforehand and not wait to get the USPS return mail codes to resolve issues.| PostGrid