日本郵便トップ > よくあるご質問・お問い合わせ > よくあるご質問・お電話でのお問い合わせ よくあるご質問・お電話でのお問い合わせ When you write sender's and recipient's name and tackle conversely to the instance under, or create them following to one another, the letter is likely to be retu