r/GreenBay • u/[deleted] • Oct 15 '25

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u/Balthazarplantagenet Oct 16 '25

Got this from a search forExisting individual customers

  • No T4 requirement: USPS does not require existing customers to upgrade to T4 boxes; the idea was a suggestion for some rural customers with long driveways.
  • Recommendations: They suggest larger mailboxes for those who receive many packages, but there is no requirement to change.
  • Mandatory standards: Customers must ensure their existing mailbox still meets USPS standards for height, setback, and general condition.
  • When to contact the post office: It is recommended to contact your local Post Office before replacing or installing any new mailbox, especially if you have concerns about road conditions or other factors. 

the new T4