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Mozmsgs files - how do I stop them being created

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I get a lot of .mozmsgs files. How do I stop them being created ?

I get a lot of .mozmsgs files. How do I stop them being created ?

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From the definition of wdseml files:

"Each file is a partial copy (up to 49KB) of a message in the mail folder, stored in a .mozmsgs subdirectory. It is used by Windows Search Integration .... They're actually renamed .eml files. You can disable this feature by unchecking Tools -> Options -> Advanced -> General -> System Integration -> Allow Windows Search to search messages"

http://kb.mozillazine.org/Files_and_folders_in_the_profile_-_Thunderbird