沒來的請舉手

這是今天上午發生的狀況，上週我將家裡的Mail Server調整了一下。主要是因為我每天平均會收到三百多封的垃圾信，這還是單只一個信箱帳號而言，而我現在使用的帳號有十幾個，可想而知我想看的信件都被垃圾信給淹沒了。

寄送垃圾郵件的技術是越來越進步了，不得以我只好改了一下Security裡面Spam跟Reverse lookups的設定。

結果今天學長跟我反應說有些Mail他沒收到，請我檢查一下是什麼原因？

我猜想可能是反向查詢時DNS不符合的關係，這意思是說，我們寄信時不是都有@xxx.xxx之類的Domain name嗎？一般在DNS裡面有這一組Domain name對應的IP，伺服器會去查詢收到信時對方伺服器的IP跟這Domain name的IP符不符合，若是不符合伺服器就判定這是垃圾信。

我跟學長說請他查看一下現在收不到信的那信箱帳號，找出以前收信裡面的資料，像是這一段：
『Return-path:
Received: from alpha.url.com.tw (alpha.url.com.tw [210.59.228.107])
by mail.duncan.idv.tw (mail.duncan.idv.tw)
(MDaemon.PRO.v7.2.0.R)
with ESMTP id md50000078563.msg
for ; Wed, 14 Dec 2005 09:13:18 +0800
Received: (qmail 18765 invoked from network); 14 Dec 2005 09:10:12 +0800
Received: from unknown (HELO comet.url.com.tw) ([210.59.228.32]) (envelope-sender )
by 0 (qmail-ldap-1.03) with SMTP; 14 Dec 2005 09:10:12 +0800
Received: (qmail 21331 invoked by uid 1001); 14 Dec 2005 09:10:09 +0800
Delivered-To: adiemus@ms2.url.com.tw
Received: (qmail 21308 invoked from network); 14 Dec 2005 09:10:09 +0800
Received: from unknown (HELO mx2.url.com.tw) ([210.59.228.65]) (envelope-sender )
by ms1.url.com.tw (qmail-ldap-1.03) with SMTP; 14 Dec 2005 09:10:09 +0800
Received: (qmail 17412 invoked from network); 14 Dec 2005 01:10:09 -0000
X-AccFilter: gw2-level 4 #C99#P0#M0#o0#x0#f0#h0#v0#c0#R0
Received: from msb.epaper.com.tw ([211.20.188.81]) (envelope-sender )
by great.url.com.tw (qmail-ldap-1.03) with SMTP; 14 Dec 2005 09:10:09 +0800
Received: from localhost (npost.epaper.com.tw [210.59.230.182])
by msb.epaper.com.tw (Postfix) with SMTP
id 7B4431C5926A9; Tue, 13 Dec 2005 18:10:03 +0800 (CST)
From: "=?big5?B?TU9PSyAgrsi5Q7lxpGyz+CAoIEhUTUwguc+k5aqpICk=?="
To: "=?big5?B?TU9PSyAgrsi5Q7lxpGyz+CAoIEhUTUwguc+k5aqpICk=?="
Date: Mon, 12 Dec 2005 15:33:00 +0800 (CST)
Subject: =?big5?B?vHew6qVArMm/8rKjpWqrsKi1wqcopFQptvi5z6vSsOq+bLd1?=
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="------=_epaper_85bf65ab94e1163a820101c224f50725"
Message-Id: <20051213101003.7B4431C5926A9@msb.epaper.com.tw>
X-Spam-Processed: mail.duncan.idv.tw, Wed, 14 Dec 2005 09:13:18 +0800
(not processed: message size (100671) exceeds max size (51200))
X-Lookup-Warning: MAIL lookup on epaper@msx.epaper.com.tw does not match 210.59.228.107
X-MDRcpt-To: duncan@mail.duncan.idv.tw
X-Rcpt-To: duncan@mail.duncan.idv.tw
X-MDRemoteIP: 210.59.228.107
X-Return-Path: epaper@msx.epaper.com.tw
X-MDaemon-Deliver-To: duncan@mail.duncan.idv.tw』