==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
I don't know if this is a problem only at our site, or if it's something more general, but I thought I would report it here in case anyone else encountered the same thing.

Our cron-based automatic cert renewal started failing last week out of the blue. The procedure had been working for many months, and no relevant changes had been made recently.

It turned out to be related to an incorrect server block in the nginx configuration, but we don't know if the conf changed or if the folder the conf pointed to changed.

If you have this issue, you can read about it (and the resolution) here:
https://community.letsencrypt.org/t/cer … /237232/27

Paul