I am replacing an old mailserver that was mail.domain.com. I setup as box.domain.com (and don’t really want to change it immediately to allow for some overlap.
Can I add mail to my box and more importantly to my let’s encrypt certificate in any way? I don’t really want to change this to mail firstly to allow for the overlap and secondly because I already asked my hosting provider to setup (and they did) the PTR record.
Obviously I want to certificate to be able to be verified to the correct name.
I should say not necissarily correct but old devices are set to use mail.citybook.services and I have about 50 printers setup. Thankfully I know the username and passwords they use so I can just create the account. But they might want to verify the certificate as might other things for all I know.