Password - The first time you use Spam Sleuth, you will be prompted to add a password. The password you use does not have to be the same as the password you use for your e-mail. The password is just for the Spam Sleuth viewer and configurating your settings.
My Outgoing Server (SMTP) requires authentication - Set your name/pwd if your company's e-mail server requires a password. Most users will not need to set anything here.
Score and store non-spam messages - Selecting this option will cause Spam Sleuth to keep all of your messages, including ones that were not deemed to be spam. This is useful for tuning, as every message will have a report.
Delete messages after UnSpamming - This causes Spam Sleuth to delete messages from the viewer when you UnSpam and send them back to your InBox. This option is selected by default so that you don't see two messages (one in spam viewer and one in your InBox).
Add Icons to Start->Programs - Adds an icon to the Start menu for conveniently launching Spam Sleuth.
Auto Login - Stores the password and logs in automatically. This option may not be available if your Administrator has disabled the option for security reasons.
Tag Mode (X-Text-Classification) - Adds 'X-Text-Classification: spam' to the header of every spam message so messages can be sorted by your e-mail program. In this mode, all messages are passed through with one of these headers added if the message has been determined to be spam, or has been modified (for script, viruses, etc).
Use Outlook Plug-in - This adds a toolbar icon to Outlook (not Outlook Express) which will let you do an Add to Friends or Add to Spammers with one click from inside Outlook.
Ask to Send UnSpammed Message - When you're unspamming messages, you will be asked whether you want to also send the messages to your InBox.