I run Zimbra, which is a mail server among other things, on CEntOS. I have one server, but it serves two domains, so I need a certificate for both/each domain. I expect SAN to completely address this aspect, although I've installed a server identification certificate on this server before, and it only worked for one of the domains. I never understood why, but I'm happy to conclude that Windows Server Certificate Authority configured the certificate. The installation and configuration process is opaque and tedious. I seek Zimbra configuration advice to the extent that it is available.
I haven't yet investigated how to do any of this with Let's Encrypt, but I have been warned about rate limits, I am understandably cautious about frivolous and erroneous steps. Zimbra runs both Apache and nginx, so I expect there to be complications in installing a signed certificate.
My web server is:
o Apache: 2.4.38
o nginx: 1.7.1
The operating system my web server runs on is (include version):
o CEntOS 7
I can login to a root shell on my machine (yes or no, or I don't know):
I'm using a control panel to manage my site:
The version of my client is ...
o I haven't gotten this far yet. I expect that what I am doing is unusual and I fear the rate limiting governors. I suspect that I am going to have to do this manually.
Thanks for the help,