Ipswitch 公司于美国时间2005年5月23日发布的针对IMail Server 8.15的Hotfix 2，修复了以下的问题官方文档原文说明如下（http://www.ipswitch.com/Support/imail/releases/imail_professional/im815hf2.html）：
IMAP4d32: Fixed crash when malicious LSUB encountered.
IMAP4D32: Fixed crash when SELECTing mailbox name with close to 256 characters.
IMAP4D32: Fixed crash when LOGIN userid was excessively long.
IMAP4D32: Fixed crash when STATUS mailbox name was excessively long.
QUEUEMGR: Fixed bug causing log information to be saved to wrong file.
Web Calendaring: Removed vulnerability whereby user could read server files using ....\ in GET.
注：
1.因为有修复QUEUEMGR这个服务，所以建议下载更新。
2.此补丁需要在IMail Server 8.15环境下才能安装。
IMail Server 8.15 Hotfix 2 下载地址：
1.本站：
http://www.5dmail.net/down/list.asp?id=989
2.官方：
ftp://ftp.ipswitch.com/Ipswitch/Product_Support/IMail/imail815hf2.exe
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