Chapter 8. Securing the Mail Transport

Introduction

Recipe  8.1.   Building a Private Certificate Authority

Recipe  8.2.   Creating a Certificate Request

Recipe  8.3.   Signing a Certificate Request

Recipe  8.4.   Configuring sendmail for STARTTLS

Recipe  8.5.   Relaying Based on the CA

Recipe  8.6.   Relaying Based on the Certificate Subject

Recipe  8.7.   Requiring Outbound Encryption

Recipe  8.8.   Requiring Inbound Encryption

Recipe  8.9.   Requiring a Verified Certificate

Recipe  8.10.   Requiring TLS for a Recipient

Recipe  8.11.   Refusing STARTTLS Service

Recipe  8.12.   Selectively Advertising STARTTLS

Recipe  8.13.   Requesting Client Certificates