Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
In September 2008, President of Poland, Lech Kaczyński, stated that the original cause of the 2008 South Ossetia war was not the Georgian operation, but the recognition of Kosovo's independence and that he would block attempts to establish diplomatic relations of Poland with Kosovo at ambassadorial level; however, the government has not proposed to send an ambassador to Pristina.
Military
Poland currently has 274 troops serving in Kosovo as peacekeepers in the NATO led Kosovo Force. Originally there was 800 Polish troops in KFOR.
Post
As of August 2009, Polish public post service Poczta Polska is still not sending mail to Kosovo because it has not yet been added to the list of countries. The mail is directed either to the small village of Kosowo in Poland or to Kosovo in Russia.