install certificate how to

[Nikos Gatsis - Qbit]

Hello list
I have a mailserver which serve about 40 virutal domains and many users
per domain using cyrus-imapd-2.4.17-13.el7.x86_64 and
sendmail-8.14.7-5.el7.x86_64.
How can I install a certificate per domain? Is that possible?

Now I use what cyrus manual suggest:

imapd.conf:
...
tls_cert_file: /var/lib/imap/server.pem
tls_key_file: /var/lib/imap/server.pem
3tls_key_file: /etc/pki/cyrus-imapd/cyrus-imapd.pem
tls_ca_file: /etc/pki/tls/certs/ca-bundle.crt
...

Thank you in advance,
Nikos