David Lewis a postman from Ystradgynlais in Powys has been found guilty of stashing over 40,000 letters in one of the biggest cases of undelivered mail Britain has ever seen.
David Lewis's lethargy was only discovered after he decided to move house and decided to dump the mail in recycling skips.
Workers at the local recycling facility became suspicious when they spotted the envelopes and junk mail and informed bosses.
The Royal Mail investigated and Lewis, 53, confessed to destroying and trying to destroy the stash.
The former postman, has been jailed for four months after pleading guilty at Neath Magistrates' Court to damaging around 100 postal packets by setting fire to them and attempting to destroy up to 40,000 more by putting them in skips to be recycled.
James Pearn, defending Lewis, said, "Throughout the whole offence, Mr Lewis did not deliberately fail to deliver addressed mail, was not deliberately hiding mail and was not deliberately storing mail."
He informed the court that Lewis left surplus door-to-door mail in his van and this built up while he was on the sick - for six weeks when he broke his ribs and for 20 weeks when he had a hernia.
"On those occasions addressed mail he assumed, wrongly, had been dealt with while he was away from work but sadly wasn't. [It] became mixed up with the door-to-door mail, which he transferred from the vehicle to his garage," Mr Pearn said.
On sentencing him, chairman of the magistrates Howard Davies said, "Your actions have caused a great deal of harm not only to your employers, to whom you were in a position of trust, but also the community who lost goods and services to which they were entitled.
"This was aggravated by your efforts to dispose of the mail with the skips."
A Royal Mail spokeswoman said, "This conviction underlines the fact that we take decisive action and will seek to prosecute all those found responsible for dishonesty."