... automatically reply to the address listed on the "from" line with a failure notice or similar message. Since the spammer impersonated you on the "...
In this case, if you have not sent any email recently, the Failure Notice indicates that your email has been hacked...
...根本打錯地址。 2. 你一次過發出太多 email，結果被人 block o左，於是出現 failure notice 。 3. 那些 failure notice 其實係有毒/垃圾電郵，引你打開來睇，等你中毒...
如果你收到 failure notice 當中有提到 I wasn't able to deliver your message to the ...或 This is a permanent error 就肯定對方收不到 --- 如果你冇收到 failure notice 訊息 咁你嘅訊息就梗係已經成功send出 --- 收件人嘅 e-mail信箱當然未過期...
俾人用你 email address 的名義寄廣告，原則上係無方法解決，好似人地用你屋企地址去做回郵地址咁。只能當 spam 處理。
"MAILER-DAEMON failure notice " 原因是1.對方mail 已滿 2.對方mail結束 3.對方mail暫停使用 註 : 如果幫到你請記得選我最佳回答
真被人hack,最好做新email address....&delete current one...
You can tell he/she to send the mail himself/herself first.