Introduction Recipe 10.1. Limiting the Number of sendmail Servers Recipe 10.2. Limiting the Number of Network Accessible Servers Recipe 10.3. Updating to Close Security Holes Recipe 10.4. Patching to Close Security Holes Recipe 10.5. Disabling Delivery to Programs Recipe 10.6. Controlling Delivery to Programs Recipe 10.7. Disabling Delivery to Files Recipe 10.8. Bypassing User .forward Files Recipe 10.9. Controlling Delivery to Files Recipe 10.10. Running sendmail Non-Set-User-ID root Recipe 10.11. Setting a Safe Default User ID Recipe 10.12. Defining Trusted Users Recipe 10.13. Identifying the sendmail Administrator Recipe 10.14. Limiting the SMTP Command Set Recipe 10.15. Requiring a Valid HELO Recipe 10.16. Restricting Command-Line Options Recipe 10.17. Denying DoS Attacks |