许多服务器和客户端邮件系统仅对“传入的”或者“新的”电子邮件进行归档，并且在电子邮件到达用户的邮箱之后便失去了作用。

Many server and client mail systems only file mail on "incoming" or "new" E-mail and become useless once the E-mail reaches the user's mailbox.

youdao

许多服务器和客户端邮件系统仅对“传入的”或者“新的”电子邮件进行归档，并且在电子邮件到达用户的邮箱之后便失去了作用。

Many server and client mail systems only file mail on "incoming" or "new" E-mail and become useless once the E-mail reaches the user's mailbox.

youdao