Technically, only
Post Office issued envelopes are accepted for mailing domestically and
internationally. Approved
envelopes have red boxes in the upper left-hand corner for the postal
code. Envelopes are sale at all post offices.
Sending Packages
Some of the large housing communities have an in-house mail counter
where you can mail letters and small packages that are under 2 kg in
weight. Large packages must be taken to a post office. Packages can
often be subject to inspection by custom officials.
Receiving
Packages
Large packages will not be delivered directly to you. You will receive
a claim form that asks you to collect the package at a specified post
office by a specified date. If you pick up the package after the
specified date, you will be charged a daily fee, and after thirty days,
the package will be returned to sender. Windows open for package
inspection from 8:00am to 5:00pm.