Kaspersky Anti-Virus 6.0 for Windows Workstations MP2 (version 6.0.2.678, 6.0.2.690

	Useful links
	How Kaspersky Anti-Virus versions 6.0/7.0/2009 co-works with the mail client The BAT! How Mail Anti-Virus works with the mail client Outlook MS Office using the protocol IMAP4 How Mail Anti-Virus and Anti-Spam function

If a mail client Mozilla Thunderbird version 1.5 or above is installed and you use a Kaspersky Lab product to scan mail then configure the mail client for the Mail Anti-Virus component to function normally. You can do it the following way: 

• open Mozilla Thunderbird 
• in the menu select Tools > Options 

• go to the Advanced tab 
• click the Config Editor button on the General tab 

• in the open window in the Filter field enter CHUNK 
• right-click the filter mail.server.default.fetch_by_chunks 
• in the context menu choose Toggle 

• make sure the Value field has changed from True to False 
• right-click the filter mail.imap.chunk_add 
• in the context menu select Change 

• change the value to 0
• close all windows and save the changes

Note! By default the filter is enabled in the mail client. This filter allows receiving a message via IMAP protocol in parts. For normal functioning of the Mail Anti-Virus component a message should be received as a whole but not in parts. It is recommended to follow the instructions from this article.