我的邮件发送不了，系统退信的的翻译：I cannot send the message, the system returned 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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I cannot send the message, the system returned

My mail could not transmit, the system drew back the letter

I cannot send mail return letter of the system.

I cannot send the message, the system returned