I present to you a situation I have on a server.
To simplify, we have two domains: lino.cloud and mondo.it
The server is configured as the main domain lino.cloud, which also has the certificates generated by letsencrypt while the additional domain has a certificate purchased from ssls.com and correctly loaded as you can see:
However, when I configure the e-mail on client indicating as host mondo.it in IMAPS or POP3S an error appears: (hostname in certificate didn’t match <mondo.it>! = <Box.lino.cloud> OR <box.lino. cloud> OR <lino.cloud> OR <mail.lino.cloud> OR <www.lino.cloud>)
I checked “System -> External DNS” of the main domain: :
While the additional domain:
As you can see, the MX record of mondo.it is pointed to box.lino.cloud
So from “System -> Custom DNS” it is possible to change the MX record of mondo.it and consequently when I configure the Mondo.it email client as an IMAPS or POP3S host, does it take the mondo.it certificate?
By inserting the trailing period and the IP address of itself, this replaces the MX record that runs on box.lino.cloud?
Another question: clicking on “Repalce Certificate” of a domain of any level, is the entire certificate of the entire domain replaced?
Let me explain: ssls.com sells the “Positive SSL” basic package for approx. 5 € / year and includes the basic domino + www, for example lino.cloud and www.lino.cloud
If I substitute this certificate for the one I currently have, which also includes other third levels eg. mail.lino.cloud, box.lino.cloud in your opinion what could happen?
In any case, do I save this folder / home / user-data / ssl everything related to the certificate is saved? Could I replace it if there was any problem or is some special operation necessary?