If you want to login to the usps liteblue login portal then you must follow the steps that are given below:- 1. The first step is to visit the official website of LiteBlue.usps.gov login and then select the sign in option which is given at the bottom of the page. 2. Now enter your LiteBlue USPS Employee Identification Number (EIN) and then click on Next. 3. Then enter the password in the required field and then click on Verify.