Growl is a third-party application 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. If you are not using Growl, turn off this option
in order to improve performance.
Growl is not available on Apple Silicon Macs, unless SpamSieve is running in
Rosetta (which is not recommended due to a macOS bug).

The following notifications are available:
- Good Message Count
- This notification mimics the red number in SpamSieve’s Dock icon (see Show
number of new good messages in Dock). 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. For more information, see the A spam message is uncertain if
preference. 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. Clicking to
close the notification does not change whether SpamSieve thinks the
message is spam. For messages that are actually spam, you don’t need to do
anything. For messages that are not spam, you should find the message in
your mail program’s spam mailbox and train it as good.
You can customize the notification style and enable/disable notifications:
- Growl 2.x
- Open the Growl application and choose Preferences… from the Growl
menu. Click on the Applications tab and select SpamSieve at the left
of the window.
- Growl 1.3.x
- Choose Open Growl Preferences… from the Growl menu.
- Growl 1.2
- Open the Growl pane in System Preferences.