sendmail Cookbook

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