• Simple Greylisting, with working example for Exim
• Introduction
• Principles of greylisting
• Problems with greylisting
• Requirements
• Databases
• Known resenders
• Greylisted mail
• Exim Implementation (users of other MTAs can stop now)
• Creating the SQLite file
• Greylisting ACL 'subroutine'
• Setting the conditions for "suspicious" mail
• Invoking the greylist ACL
• Tidying the database
• Other tips
• Manually inserting a 'known resender'
• Sharing resenders database between hosts
• Fedora package
• Statistics