To log in to LiteBlue, the liteblue portal for USPS employees, visit liteblue.usps.gov. Enter your USPS Employee ID and your Self-Service Password (SSP). Your Employee ID is an eight-digit number found on your earnings statement. If you haven't set up an SSP, you must create one at ssp.usps.gov before logging in. Ensure your credentials are correct, as multiple failed attempts may lock your account. If you experience issues, use the password reset option or contact USPS support. The LiteBlue portal provides access to work schedules, benefits, and other USPS resources essential for employees.