Royal Mail said it has been appointed to a three year framework deal to provide Scottish Public Bodies with postal services.
The deal is said to be worth about £60 million.
The framework, awarded after a competitive tender by Scottish Procurement, means the Royal Mail becomes the supplier for Scottish Government, local authority and public body postal services.
The new framework is split into two lots covering physical and hybrid mail and scheduled and regular bulk mail.
“Royal Mail now services both lots of the framework which includes the sortation and delivery of all hybrid mail and the sortation and delivery of bulk mail across the country,” said Royal Mail.
Associated print work will be carried out by Royal Mail’s partner CFH Docmail in Livingston.
Scottish Government cabinet secretary for finance Derek Mackay, said: “Congratulations to Royal Mail on its appointment to the Scottish Ministers Postal Services Framework for at least the next three years.
“This will deliver savings across the public sector and ensure national coverage for organisations across Scotland.”
Rob Jenson, operations director, north, Royal Mail said: “As the UK’s Universal Service Provider and one of the largest employers in Scotland, Royal Mail is proud to serve the Scottish Government and the whole of Scotland.
“Working together with Scottish Procurement, we have secured a great deal for all contracting bodies across the country.
“The awarding of this contract is testament to the hard work and dedication of our 11,000 postmen and women across Scotland.
“They provide a high quality service to 2.5 million addresses, six days a week.”
The framework is a three year plus one year deal.