noun
special mail; special handling mail
A postal service category for items requiring special handling, such as registered mail, express delivery, or insured mail.
特殊取扱郵便には書留や速達などが含まれる。
Special handling mail includes registered mail, express delivery, and the like.
Compound of 特殊 (special) + 取扱 (handling) + 郵便 (mail).