Businesses and residents are now opting to use a postal service being run by a Leverington newsagent rather than Royal Mail.
Brian Webb and his Welly Post are handling up to 1,000 letters a day which are delivered to 20 villages around Wisbech.
Mr Webb and his fleet of 12 vans are now dropping post along with newspapers through letter boxes of homes and businesses in the Fenland area.
Since March, Mr Webb has sold 40,000 of his Welly Post stamps, which costs just 30p each - compared with the 62p price of a first class stamp.
The postal service, which guarantees next day delivery, was given national coverage in the i newspaper on Friday last week.
Mr Webb said: “It has gone brilliantly.
“People do use emails but the if the price is right people will still use the post.
“We are a small fish in the sea at the end of the day but the amount of post we are dealing with is ridiculous.
“Our residential customers save £3 for every 10 local letters they post. Many local businesses have come on board to take advantage of having next day delivery and with the high volumes of letters they send locally they’re saving loads of money in the process.”
He came up with the idea after a customer remarked how his mother Joan would be disgusted with the price of stamps.
Mr Webb sells a book of 10 Welly Post stamps for the price of £3. Customers either contact him to say they have a letter or leave it poking out of their letterboxes.
To take advantage of the service, customers are required to use his newsagents service, although there is no requirement for a daily paper.
Once collected the letters are sorted into 46 runs and delivered seven-days-a-week.
Mr Webb said: “I am gobsmacked at how busy it has become.
“We don’t take the letters unless they are customers which is working both ways. It has increased the newspaper side of things.
“Whatever post we touch, we won’t matter to Royal Mail.”