Plugin installed incorrectly. Rename plugin directory 'swiftmail.backup' to 'swiftmail'.
This is an old revision of the document!
Emptying the cache in Internet Explorer 8
1. Within the Extras menu, click on Delete Browsing History.
2. Select Temporary internet files and Website data as well as Cookies. Preserve Favorites Website Data should not be selected.
3. Confirm by selecting Delete.