Transport Layer Security (TLS, formerly called SSL) provides
certificate-based authentication and encrypted sessions. An
encrypted session protects the information that is transmitted with
SMTP mail or with SASL authentication.
Postfix version 2.2 introduces support for TLS as described in
RFC 3207. TLS Support for older Postfix versions was available as
an add-on patch. The section "
Postfix < 2.2 TLS support" below discusses the differences
between these implementations.
Topics covered in this document:
And last but not least, for the impatient: