An Post behind delivery targets
An Post's mail delivery rates are falling significantly behind targets the company set seven years ago.
A tracking survey of postal service and quality has found 85pc of standard letters, large envelopes and packets reached destinations within one day.
But the Commission for Communications Regulation (ComReg) warned that it still fell far short of An Post's own target for 94pc one day delivery.
The scorecard showed the service managed a 1pc improvement compared to 2009.
ComReg said: "Despite the An Post performance standard of 94pc being in place since 2004, a significant deficit still prevails between actual performance and An Post's performance standard."
The assessment, the eighth independent report on An Post's quality, ruled out delays in the service brought about by two spells of freezing weather at the end of November into December and the fortnight leading up to the new year.
The best-performing postal routes are locally outside County Dublin where there is an 86pc next day success rate.
Mail sent from outside the county into the capital had the worst score of 83pc for next day delivery.
The study, conducted by Ipsos MRBI, found that 99pc of all mail was delivered within three working days, narrowly failing to hit targets by just half a per cent.
The report was based on 28,487 test mail items, posted and delivered to identify on time reliability.
An Post made a €5.8m profit last year and has warned it will need to reduce its workforce by 1,600 by 2015 on top of the 730 lay-offs over the past two years.
An Post said it has made sustained improvements since the targets were set in 2004 with the next-day delivery scores in 2006 at just 72pc before climbing to 84pc by 2009.
"What we have been aiming for is sustained improvements. The most important thing for An Post is that we stick with it and improve," a spokeswoman said.