noun
outbox
Refers to the folder or location where outgoing email messages are stored before being sent. Used in email clients and similar internet contexts.
See also: 送信箱
送信前のメールはアウトボックスに保存されます。
Emails before sending are saved in the outbox.
送信箱 is a less common Japanese term for 'outbox', while アウトボックス is the more typical katakana loanword used in software interfaces.
Borrowed from English 'outbox'.