These are the default settings for spam filtering and folder auto-clean in Smartermail.
These can be overridden by logging in to Webmail, and making changes in Settings.
Default Folder Auto-clean Rules:
Deleted Items Over 300MB, reduce to 50MB
Junk Email Over 200MB, reduce to 50MB
Default Spam Filtering:
Low Probability of Spam:
Weight Threshold 5
Default Action Prefix subject line with text
Text to Add SPAM-LOW:
Medium Probability of Spam:
Weight Threshold 12
Default Action Move to Junk E-Mail folder
High Probability of Spam:
Weight Threshold 20
Default Action Delete the Message