|By default, the /etc/exim.conf will use the cert/key files:|
They're controlled by the exim.conf's options:
tls_certificate = /etc/exim.cert
If you have a CA Root certificate (ca bundle, chain, etc.) you'll add the contents of your CA into the exim.cert, after your actual certificate.
Probably a good idea to make sure you have a copy of everything elsewhere in case you make an error.
Dovecot and ProFtpd should also read it correctly, so dovecot no longer needs the ssl_ca option.
So for both cases, there is no need to make any changes to either the exim.conf or dovecot.conf(/etc/dovecot/conf/ssl.conf)
|How to create a new self-signed /etc/exim.cert and /etc/exim.key|
|Per-IP ssl certificates for exim|
|SSL Certificates with dovecot|
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