請問mdaemon處理信件問題

luke999

請教～最近我的mdaemon 10.0.4發生遲遲信件無法處理進入問題～
以下為當中一個log:

Tue 2009-11-03 10:08:32: ----------
Tue 2009-11-03 10:08:37: [3373:1] Session 3373; child 1; thread 4044
Tue 2009-11-03 10:08:37: [3373:1] Accepting SMTP connection from [203.188.201.146:48006]
Tue 2009-11-03 10:08:37: [3373:1] --> 220 mydomain.com.tw ESMTP MDaemon 10.0.4; Tue, 03 Nov 2009 10:08:37 +0800
Tue 2009-11-03 10:08:37: [3373:1] <-- HELO web73806.mail.tp2.yahoo.com
Tue 2009-11-03 10:08:37: [3373:1] Performing IP lookup (web73806.mail.tp2.yahoo.com)
Tue 2009-11-03 10:08:37: [3373:1] *  D=web73806.mail.tp2.yahoo.com TTL=(30) A=[203.188.201.146]
Tue 2009-11-03 10:08:37: [3373:1] ---- End IP lookup results
Tue 2009-11-03 10:08:37: [3373:1] --> 250 mydomain.com.tw Hello web73806.mail.tp2.yahoo.com, pleased to meet you
Tue 2009-11-03 10:08:37: [3373:1] <-- MAIL FROM:<abc@yahoo.com.tw>
Tue 2009-11-03 10:08:37: [3373:1] Performing PTR lookup (146.201.188.203.IN-ADDR.ARPA)
Tue 2009-11-03 10:08:37: [3373:1] *  D=146.201.188.203.IN-ADDR.ARPA TTL=(20) PTR=[web73806.mail.tp2.yahoo.com]
Tue 2009-11-03 10:08:37: [3373:1] *  Gathering A records...
Tue 2009-11-03 10:08:37: [3373:1] *  D=web73806.mail.tp2.yahoo.com TTL=(30) A=[203.188.201.146]
Tue 2009-11-03 10:08:37: [3373:1] ---- End PTR results
Tue 2009-11-03 10:08:37: [3373:1] Performing IP lookup (yahoo.com.tw)
Tue 2009-11-03 10:08:37: [3373:1] *  D=yahoo.com.tw TTL=(25) A=[119.160.246.23]
Tue 2009-11-03 10:08:37: [3373:1] *  D=yahoo.com.tw TTL=(25) A=[203.84.202.10]
Tue 2009-11-03 10:08:37: [3373:1] *  P=005 S=000 D=yahoo.com.tw TTL=(3) MX=[mx1.mail.tw.yahoo.com] {203.188.197.9}
Tue 2009-11-03 10:08:37: [3373:1] *  P=005 S=001 D=yahoo.com.tw TTL=(3) MX=[mx2.mail.tw.yahoo.com] {203.188.197.10}
Tue 2009-11-03 10:08:37: [3373:1] ---- End IP lookup results
Tue 2009-11-03 10:08:37: [3373:1] Performing SPF lookup (yahoo.com.tw / 203.188.201.146)
Tue 2009-11-03 10:08:37: [3373:1] *  Result: none; no SPF record in DNS
Tue 2009-11-03 10:08:37: [3373:1] ---- End SPF results
Tue 2009-11-03 10:08:37: [3373:1] --> 250 <abc@yahoo.com.tw>, Sender ok
Tue 2009-11-03 10:08:37: [3373:1] <-- RCPT TO:<my@mydomain.com.tw>
Tue 2009-11-03 10:08:37: [3373:1] --> 451 Greylisting enabled, try again in 5 minutes
Tue 2009-11-03 10:08:37: [3373:1] <-- QUIT
Tue 2009-11-03 10:08:37: [3373:1] --> 221 See ya in cyberspace
Tue 2009-11-03 10:08:37: [3373:1] SMTP session terminated (Bytes in/out: 106/263)
Tue 2009-11-03 10:15:01: ----------

如果在mdaemon選擇stop mdaemon～～遲遲無法停止～～程式說正在停止query......處理了幾分鐘才沒有關閉
於是我選擇程式選單中的stop mdaemon圖示才停止
但看「工作管理員」->「處理程序中」
mdaemon還在～
於是我強制關閉此mdaemon程序～～接著啟動mdaemon
幾秒鐘～～query中的幾封信件就回到該收件者信箱了～～

why?
如何解決呢？
感恩～

终极坏蛋

DNS貌似找不到<my@mydomain.com.tw>

luke999

非也～
如果說找不到
應該是mydomain.com.tw
找不到yahoo.com.tw

這就不太可能了