Growl is a free, third-party package that can enhance SpamSieve’s
notification abilities. Once you have downloaded and installed Growl,
the next time SpamSieve is launched it will use Growl to notify you
when new messages arrive. You can customize the notification style and
enable/disable notifications using the Growl pane in System
Preferences.

The following notifications are available:
- Good Message Count
- This notification mimics the red number in SpamSieve’s Dock icon.
After a batch of good messages arrives, it tells you how many new
messages there are and then fades away.
- Good Messages (in Address Book)
- This posts one notification for each good message that arrives (where
the sender is in your address book), showing the message’s subject,
the first few lines of its body, and (if possible) a picture of the
sender.
- Good Messages (Not in Address Book)
- This posts one notification for each good message that arrives
(where the sender is not in your address book), showing the
message’s subject and the first few lines of its body.
- Uncertain Spam
- This notification helps you spot false positives by telling you
when a message has arrived that SpamSieve thinks is spam, but that
may actually be good. In SpamSieve’s preferences, you can set the
score range for “uncertain spam”, and then you will get a Growl
notification for each message with a score in this range. By
watching these notifications, you can spot false positives without
having to look through the entire contents of the spam folder in
your mail program. Unlike the other notifications, Uncertain Spam
notifications will persist until you click to dismiss them.
If you are not using Growl, turn off this option in order to improve
performance.