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Postfix Documentation
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What Postfix TLS support does for you

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 " Compatibility with 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:

Postfix Documentation
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