The Post Office is asking people to bear with it over TT.
On Facebook, it says the motorsport festival fortnight brings massive increases in traffic on the roads.
That means some disruption and delay to normal delivery and collection times.
It says it'll do everything it can to minimise disruption, but is asking people to be patient.
New powers proposed for housing authorities
37 babies born at the Jane last month
Court rejects fraudster's freemason conspiracy claims
Government working to refresh economic strategy
Drone ban for skateboarding championship
Pick it up plea from Castletown commissioners
New online Isle of Man guide for refugees and asylum seekers
Lifeboat called to yacht's rescue