Undelivered mail returned to sender的中文含义

Undelivered mail returned to sender的中文含义 Undelivered Mail Returned to Sender 发邮件的问题,Undelivered Mail Returned to Sender 英语翻译Mail Delivery System》Undelivered Mail Returned to Sender Undelivered Mail Returned to Sender翻译成汉语, Undelivered Mail Returned to Sender.eml 怎么翻译? 发邮件时,显示Undelivered Mail Returned to Sender Undelivered Mail Returned to 英语翻译Undelivered Mail Returned to Sender This is the mail sys 英语翻译Undelivered Mail Returned to SenderThis is the mail syst 英语翻译Undelivered Mail Returned to SenderThis is the Postfix p Mail delivery failed:returning message to sender