In Kaspersky Lab 2011 products when the mail is scanned by the protocol IMAP4 in the mail client Outlook MS Office 2003/2007 by default before scan all messages are downloaded on the computer locally.
In order Mail Anti-Virus would not scan these messages on delivery but would scan them only on read, perform the following actions:
- Open the mail client Outlook MS Office 2003/2007
- In the upper menu select Tools > Options
- In the open menu go to the Kaspersky Anti-Virus tab
- Uncheck Scan upon receiving
- Check Scan when read

- Click the Apply button
- Close all windows.