The changes were put in place due to factors including social distancing rules and a “high level” of coronavirus related absences.
However, it has now confirmed services will return to normal from tomorrow.
The Royal Mail website said: “We will resume the six-day-a-week delivery of letters and parcels from June 13.”
This means Britons can receive all deliveries, including letters and parcels, every day from Monday to Saturday.
The change was first put into place five weeks ago as many companies tried to adapt to lockdown rules.
Although the mail service continued, Royal Mail explained that some members of staff had been self-isolating.
A message on the Royal Mail website at the time read: “We continue to work hard to collect, process and deliver the UK’s mail in unprecedented times.
“However, along with other organisations, we are experiencing increased levels of employee absence due to illness and self-isolation.
“Absence rates are currently significantly higher than what we normally expect at this time of year.”
To deal with this, they updated delivery services across the UK.
The post continued: “To manage these severe absence levels, we are implementing a range of mitigations.
“These include changing the time guarantee on Special Delivery, deploying non-operational managers in delivery and temporarily no longer delivering letters on a Saturday.”
The coronavirus lockdown was announced on March 23 and Britons were asked to stay at home as much as possible.
Over the last few weeks, the UK government has started to relax restrictions.
This included relaxing rules on going outdoors and the reopening on non-essential retail stores.