postal delivery worker; mail carrier; postman/postwoman
Neutral term for a person who delivers mail. The synonym 郵便配達人 is also common.
See also: 郵便配達人 (ゆうびんはいたつにん)
The postal delivery worker brings letters every morning at 9 o'clock.
Synonym with the same meaning; 郵便配達員 is slightly more common in official contexts, while 郵便配達人 is also widely used.
郵便屋 is the casual, everyday word for a mail carrier, while 郵便配達員 is the formal, official term used in business or written contexts.
Compound of 郵便 (mail) + 配達 (delivery) + 員 (person in charge).