After users delete messages or empty the trash, they must compact their mail database on the server.

用户删除消息或清空垃圾后，必须压缩服务器上的邮件数据库。

youdao

Moving the messages will always delete their originals after the copies have been made in the destination mailbox, as implemented by mail: : IMAPClient.

移动消息时，总是在消息的副本被保存在目的地邮箱之后才删除原始消息，这一点和Mail： IMAPClient的实现相同。

youdao

The e-mail processor uses the mailouts class to retrieve the pending e-mail, then uses it again to delete the pending messages from the queue.

电子邮件处理程序使用 mailouts 类检索未处理的电子邮件，然后再次使用它从队列中删除未处理的电子邮件。

youdao

This estimate includes the time it takes people to delete the messages, the cost of buying larger mail servers and storage systems to cope with inboxes flooded with the messages and the cost of having staff unclog networks overloaded by spam.

BBC: AOL targets spam e-mails

On Mail for iPhone, users can select multiple messages and swipe to delete, highlight or file them away.

CNN: Yahoo pushes all users to new e-mail