Posted by fordfrog | Filed under Linux
This article describes just how to install certificates with intermediate certificate in Postfix, it does not describe how to configure Postfix for SSL as that is pretty complex topic.
For configuration you need these files:
domain.tld.key (your private key),
domain.tld.crt (your public certificate) and
intermediate.crt (intermediate certificate of your certificate authority).
The configuration is pretty easy (once you know the steps). First you need to create combined PEM file:
cat domain.tld.key domain.tld.crt intermediate.crt > domain.tld.pem
Next you need to change two variables in Postfix
main.cf configuration file:
... smtpd_tls_cert_file = /path/to/domain.tld.pem smtpd_tls_key_file = /path/to/domain.tld.pem ...
Now just restart
postfix daemon and you’re done 🙂
Tags: Postfix Mailserver