Service The postal service is generally reliable. Allow at least a couple of weeks for letters and postcards to arrive home from Mongolia.
Stamps You can buy stamps in post offices (and top-end hotels) in Ulaanbaatar and aimag capitals.
Poste restante The poste restante at the Central Post Office in Ulaanbaatar seems to work quite well; bring along your passport as proof of identification. Don’t even think about using poste restante anywhere else in the country.
Couriers The more reliable courier services include DHL and FedEx.
Postal rates Normal-sized letters cost T1320 and postcards cost T1100 to all countries. A 1kg airmail parcel to Europe or the USA is around T70,000.