Topic: Suddenly STARTTLS is not working.
==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.6.1
- Deployed with iRedMail Easy or the downloadable installer? download
- Linux/BSD distribution name and version: Ubuntu 20.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====
All of the sudden, my Nextcloud (or desktop apps) are not connecting to IMAP. SMTP seems to work though. Both were setup with STARTTLS and both have worked fine for over a year. But today the IMAP stopped authenticating altogether. Certificate is fine. Using Roundcube on local install works fine. Using SOGo on local install times out on authentication.
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