No postage stamps were used but a register was kept of all letters received at the Post Office and of the names of sailing ships on which they were conveyed.

In the early days, the flagstaff at Government Hill (now Fort Canning) was eagerly watched as flying of a flag at daylight, or the firing of a gun at night, signified the arrival of a ship with mail.

Postal delivery services by means of bullock cart, horse carriage or on foot, were first restricted to the town area.

In 1873, a new General Post office was built on the site of the former Fort Fullerton, a location which was much nearer to the commercial centre of the town.

However, the British Government failed to foresee the needs of the future, with the result that the building had to be replaced by another on practically the same site.

As a licensee, Singapore Post is allowed to operate postal services - receiving, collecting and delivering letters and postcards from one place to another until 31 March 2037.

[7] SingPost was fined S$100,000 in 2017[8] and S$300,000 in 2018[9] for failing to meet mail delivery standards by the Infocomm Media Development Authority (IMDA).

On the evening on 22 December 2024, it was announced that CEO Vincent Phang was sacked together with two other senior executives over mishandling of whistleblower's report.

[10] Phang and group chief financial officer Vincent Yik announced they would contest the decision by Singapore Post.

In 2009, it acquired the remaining 50% stake in G3 Worldwide Aspac (G3AP),[14] thereby giving the company presence in 10 countries (including Singapore).

[16] In 2014, its whole-owned subsidiary Quantium Solutions (Australia) acquired 100% of Couriers Please Holdings, an Australia-based last mile delivery company, from New Zealand Post Group.

In 2018, SingPost chose to integrate AI-assisted route planning software from LogiNext into its logistics platform, dubbed LaMP.

[20] In December 2020, SingPost acquired a 28% stake in Freight Management Holdings (FMH), a leading 4th party logistics (4PL) service company in Australia.