Many people often wonder what “TMO” means in the post office. TMO actually stands for “Transit Mail Office,” which is a crucial hub in the postal system. TMO is a part of the Railway Mail Service (RMS) and is responsible for handling closed bags only.

In simpler terms, TMO ensures that your mail reaches its intended destination by navigating through the postal network efficiently. So, the next time you see TMO in a postal tracking update, know that it’s a sign that your mail is making its way through the system to get to you as quickly as possible.