She really is terrible. She didn't even do sufficient research to find out that it has nothing to do with An Post ("An Post’s poorly designed postcode system should already have been returned to sender")
An Post unsurprisingly took umbrage at her lies/inability to factcheck her own prejudices:
The original subheading on this column referred to ‘An Post’s poorly designed postcode system’. An Post has pointed out that it had no role in the design of eircode and that it has no responsibility for monitoring the uptake of eircodes. This was edited on February 13th, 2017.
She reads like a parody of an idiot liberal snowflake journalist, except that wouldn't be funny...and it really isn't funny that she gets paid for this drivel.