The latest report from the communications regulator shows that An Post's performance improved slightly in the three months from April to June.
ComReg said that the level of standard post delivered within one working day was up 2% to 80%.
Overall, 98% of mail was delivered within three working days, still short of the ComReg target of 99.5%.
There was an improvement in the area of mail posted in Dublin for next day delivery in the city. At 83%, it was at the same level for 2007, but it was up from the 75% recorded in Q1 of this year.
