Some e-mail client programs, such as Microsoft Outlook Express, let you send large e-mail messages in several fragments. By default, when FPE scans fragmented messages (content type: message/partial), the e-mail message may be treated as a FragmentedMessage. In this case, the message is replaced with deletion text.

You can prevent FPE from deleting fragmented e-mail messages by disabling the Delete partial SMTP messages setting.

To prevent the deletion of fragmented e-mail messages
  1. In the Forefront Protection 2010 for Exchange Server Administrator Console, click Policy Management, and under Global Settings, click Advanced Options.

  2. In the Global Settings - Advanced Options pane, under the Deletion Criteria section, clear the Delete partial SMTP messages check box, and then click Save.

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