The Postal Service is reminding employees and contractors to follow basic practices and safeguards against human error to prevent cyberthreats.
Human error includes leaving a workstation unlocked, clicking a link in a phishing email or mishandling sensitive information. Such actions can result in sensitive data being leaked, credentials being stolen and personally identifiable information being exposed.
Human error accounted for 60 percent of data breaches last year, according to the 2025 Verizon Data Breach Investigations Report.
Here are some tips to minimize human error:
• Lock your computer when not using it by clicking the Windows key + L, or by clicking CTRL + ALT + Delete.
•Don’t respond to suspicious phone calls, text messages or emails. And before clicking any links, hover your cursor over each one to verify the sender and destination.
• Add #sensitive# to the subject line of any email containing sensitive or sensitive-enhanced information that is being sent outside the USPS network.
• Don’t plug an unapproved flash drive, external hard drive or smartphone into USPS computers. Use only USPS-approved USB devices found in the eBuyPlus catalog.
The CyberSafe at USPS Blue and LiteBlue pages have more information.
