请看这封mail退信，什么原因？

viken

Subject: DELIVERY FAILURE: can't create user output file. Command output: maildrop: maildirover quota.<br>
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This is the Postfix program at host del01.csee.chicago.<br>
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I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.<br>
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For further assistance, please send mail to <postmaster><br>
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If you do so, please include this problem report. You can delete your own text from the attached returned message.<br>
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The Postfix program<br>
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<jbarrett@btfg.com>: can't create user output file. Command output: maildrop:<br>
maildir over quota.<br>
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Reporting-MTA: dns; del01.csee.chicago<br>
X-Postfix-Queue-ID: 25126D7314<br>
X-Postfix-Sender: rfc822; 发件人mail地址<br>
Arrival-Date: Wed, 9 Nov 2005 00:07:00 -0600 (CST)<br>
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Final-Recipient: rfc822; jbarrett@btfg.com<br>
Action: failed<br>
Status: 5.0.0<br>
Diagnostic-Code: X-Postfix; can't create user output file. Command output:<br>
maildrop: maildir over quota.<br>
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Vernal

maildir over quota.<br>
超出用户空间配额

viken

超出用户空间配额是由谁引起呢？由我们这边的mail系统还是对方？<br>
谢谢啊<br>

yinjie

多半是收件方服务器的限制

apuawv

w32.mytob@mm病毒了。

菡萏

是中毒了，杀毒吧，我的服务器也是这样，杀毒之后就没事了