Emails and internet shopping have stamped out the need for traditional mailbags for postmen and women throughout the city.
For the Milton Keynes mail is now simply too heavy to carry in a Royal Mail shoulder mail.
Instead posties have been issued with push-along covered trollies to cater for all the ebay and Amazon bargains.
The new sign of the times system was launched this week in Bletchley and will eventually spread to the rest of the city, says Royal Mail.
“The way in which we communicate with each other has changed dramatically,” said a spokesman.
“Unfortunately fewer letters are now posted every day and Royal Mail needs to organise its delivery routes to be as efficient as possible.”
The boom in online shopping has proved an equally hefty problem because of the sheer volume of parcels posties now have to deliver,.
The new trollies are slightly bigger than a shopping trolley and will reduce the risk of injury from carrying heavy mail bags.
But for customers themselves it will mean changes to delivery routes and times.
“The time customers receive mail will depend on where they live on the new delivery route. This may be later or possibly earlier than current delivery times,” said the spokesman,
“These changes will require a period of adjustment for staff. However Royal Mail will be doing everything possible to maintain a high level of service and thanks customers for their understanding.”