MOUNTAINS of post are lying undelivered at Holmfirth sorting office.
And there are fears it is vulnerable to theft at the sorting office.
An Examiner investigation uncovered hundreds of parcels and letters left in cages at the doors of the rural delivery centre.
A reporter called at the Station Road site and saw cages of mail waiting to go out.
He was not challenged and was able to stroll on to the site and into the sorting hall, raising questions about postal security.
There were packages of plants that had been there for days and a cursory search revealed a parcel with a postmark dated September 12 - a week earlier.
A year ago the Examiner reported how the change to a once-a-day delivery and staff absence meant piles of post had been accumulating in Holmfirth.
But then post bosses said they had taken on casual staff to get deliveries back on track.
A spokesman for Royal Mail said: "We apologise to those customers in the Holmfirth area whose mail may have been delivered late recently.
"This is due largely to unusually high levels of sick absence coupled with other staff taking annual leave.
"We have taken steps to address these issues and deliveries should be back to normal later this week.
"Some of the mail in the two cages you saw will be delivered today but some of it was not due to be delivered until tomorrow.
"It's impossible to say exactly how many items are overdue."
The spokesman said the company took the security of post very seriously.
He added: "Security is a top priority for Royal Mail and we will be investigating why your colleague was not challenged on entering our premises."
A spokesman for Postwatch, the postal service watchdog, urged anyone with a problem to complain to Royal Mail.
He added: "We are not here to tell them how to recruit or run their business.
"We are here to make sure they are carrying out the services that customers require.
"People should log their problems with Royal Mail.
"A picture can then be built up about specific problems and these can be resolved."
Problems with postal services should be addressed to Royal Mail on 0845 7 740 740.