【求助】mdaemon防病毒设置问题

在其antivirus settings 下　scanner actions中选择
delete the entire message
可是我还是能收到一些病毒邮件，如那个微软更新的病毒，只是收到的邮件已经没有了附件。
看mdaemon设置，发现有这种现象，有些病毒邮件可以删除，有些却只把附件删掉了，请问是怎么回事呢？

附：mdaemon日志 (两个病毒邮件，一个删除了，一个只删掉附件)
Fri 2003-11-07 11:35:18: MDaemon AntiVirus processing d:\mdaemon\localq\md50000055328.msg...
Fri 2003-11-07 11:35:18: > Message return-path: mitsunobu-s@mvc.biglobe.ne.jp
Fri 2003-11-07 11:35:18: > Message from: iyzojdiatrjw_kfghto@technet.com
Fri 2003-11-07 11:35:18: > Message to: hg@jandar.com.cn
Fri 2003-11-07 11:35:18: > Message subject: Latest Microsoft Critical Upgrade
Fri 2003-11-07 11:35:18: > Message ID: <20031107123127.MAOUC0A827A7.6441CA41@mvc.biglobe.ne.jp>
Fri 2003-11-07 11:35:18: Start MDaemon AntiVirus results
Fri 2003-11-07 11:35:19: * installation37.exe was scanned by a background virus scanner and found to be infected/suspicious
Fri 2003-11-07 11:35:19: * installation37.exe was removed from message
Fri 2003-11-07 11:35:19: * Total attachments scanned : 3 (including multipart/alternatives)
Fri 2003-11-07 11:35:19: * Total attachments infected : 1
Fri 2003-11-07 11:35:19: * Total attachments disinfected: 0
Fri 2003-11-07 11:35:19: * Total attachments removed : 1
Fri 2003-11-07 11:35:19: * Total errors while scanning : 0
Fri 2003-11-07 11:35:19: End of MDaemon AntiVirus results
Fri 2003-11-07 11:35:19: ----------
Fri 2003-11-07 11:37:11: MDaemon AntiVirus processing d:\mdaemon\localq\md50000055331.msg...
Fri 2003-11-07 11:37:11: > Message return-path: mitsunobu-s@mvc.biglobe.ne.jp
Fri 2003-11-07 11:37:11: > Message from: gmailform@puremail.com
Fri 2003-11-07 11:37:11: > Message to: hg@jandar.com.cn
Fri 2003-11-07 11:37:11: > Message subject: error letter
Fri 2003-11-07 11:37:11: > Message ID: <20031107123249.MASEC0A827A7.6441CA41@mvc.biglobe.ne.jp>
Fri 2003-11-07 11:37:11: Start MDaemon AntiVirus results
Fri 2003-11-07 11:37:11: * cf2834525423.att is infected by Exploit.IFrame.FileDownload
Fri 2003-11-07 11:37:11: * Total attachments scanned : 1 (including multipart/alternatives)
Fri 2003-11-07 11:37:11: * Total attachments infected : 1
Fri 2003-11-07 11:37:11: * Total attachments disinfected: 0
Fri 2003-11-07 11:37:11: * Message deleted