I noticed that the Internet Mail provider scan also emails from Outlook (using outlook 2003 @ windows xp).
I temporary remove the outlook provider for testing thunderbird and I think that I don’t need it to reinstall.
Do I need the outlook provider for an intensive scan?
I don’t need avast signature in mails!
This setting affects MS Outlook and MS Exchange mail clients only.
For setting up the other mail clients, such as Outlook Express, Eudora etc., see Internet Mail Provider.
Internet Mail provider does scan mails from full Outlook in the situation where the Outlook / Exchange provider is either uninstalled or (perhpas) just turned off.
You may choose whichever provider you like best. Outlook / Exchange is more suitable for full Outlook, it does not have problems with timeouts, can scan emails coming from SSL secured connections, can protect you from infected emailes already in your .PST file and the like. It costs you nothing when Outlook is not running (no memory or CPU time).