[1] The museum was not primarily about postage stamps, although it has a first-class collection that numbered in the tens of thousands.

The museum's collections included a writing desk that belonged to Sandford Fleming, designer of Canada's first postage stamp; Canadian and foreign letter boxes and postal uniforms; mail bags and rural mail boxes; post office signs and sorting equipment.

In addition to its public exhibitions, the museum had a mandate to collect, preserve and interpret material objects relating to Canada's postal heritage.

Two traveling exhibitions are also being developed and will be shown at museums across the country.

As well, A Chronology of Canadian Postal History and many other online exhibitions will remain on the Museum's website.