Snails have replaced dogs as the major pest to postmen and it's all because of the glue used to seal envelopes.
Somehow snails have realised they like the taste of either human saliva or the glue on envelopes.
And now they know they like it, they are doing anything to get a taste, including climbing all the way up postboxes and then dropping down into the letters for a feast.
Some mornings postmen have found as many as 30 snails among the letters, enjoying an unusual breakfast.
Furry solution to snail problem
Thankfully post office bosses have found a solution, fitting furry draught excluders to the postboxes.
Amazingly, the snails don't like being tickled by the plastic brushes and have given up on the boxes where the draught excluders have been fitted.