when using Incredimail, there exists some files like "Deleted Items.imm", this file grows very fast, and it doesnt matter if u delete your mails in Incredimail , there always consists crap in these files, you find them in
I:\documents and Settings\User\Local Settings\Applicationdata\IM\Identities\{71893342-B6F5-11D9-B3F2-0030843AA98E}\Message Store
The same Problem with "Sent Items.imm", although the mails in Sent Folder dont exist anymore, these file still got all mail data.
you can always add the folder, either through the includes section or through winapp2.ini (see the link in my signature). Winapp2.ini is usually where programs get their start toward the path of being included in the default included programs.
[incredimail*]
Warning=This will empty the contents of your ‘Deleted’ and ‘Sent’ folders
LangSecRef=3022
DetectFile=%LocalAppData%\IM
Default=False
FileKey1=%LocalAppData%\IM\Identities*\Message Store|deleted items.imm
FileKey2=%LocalAppData%\IM\Identities*\Message Store|sent items.imm
Edit: Wait a second.....the Original Post is from 2009!