Postcrossing profile關於「Postcrossing 2021」標籤，搜尋引擎有相關的訊息討論：
User henna168, from Taiwan - PostcrossingProfile of member henna168, in Taiwan at Postcrossing.com - The Traveling ... *Already received more than 5 official 2020 and 2021 World Postcard Day card ...Explore countries and territories in Postcrossing... dependent territories and