Yes, it took me ages to get them to just bark a couple of times and leave it.
Since this postie has been on the job he/she has been posting biscuits through the letter box to them. They probably think that they are being friendly to them, but all they are doing is giving the dogs a treat when they bark at the door.
Now its so bad that they have ripped off the letter box cover to try and get at the biscuits and my first Amateur Photographer magazing subscription has massive teeth mark in them.
I've been unable to speak to postie yet as its only been about a month and I work shifts.